capi/geos_c.h.in

   1 /************************************************************************
   2  *
   3  * $Id$
   4  *
   5  * C-Wrapper for GEOS library
   6  *
   7  * Copyright (C) 2010 2011 Sandro Santilli <strk@keybit.net>
   8  * Copyright (C) 2005 Refractions Research Inc.
   9  *
  10  * This is free software; you can redistribute and/or modify it under
  11  * the terms of the GNU Lesser General Public Licence as published
  12  * by the Free Software Foundation.
  13  * See the COPYING file for more information.
  14  *
  15  * Author: Sandro Santilli <strk@refractions.net>
  16  *
  17  ***********************************************************************
  18  *
  19  * GENERAL NOTES:
  20  *
  21  *      - Remember to call initGEOS() before any use of this library's
  22  *        functions, and call finishGEOS() when done.
  23  *
  24  *      - Currently you have to explicitly GEOSGeom_destroy() all
  25  *        GEOSGeom objects to avoid memory leaks, and to GEOSFree()
  26  *        all returned char * (unless const).
  27  *
  28  ***********************************************************************/
  29
  30 #ifndef GEOS_C_H_INCLUDED
  31 #define GEOS_C_H_INCLUDED
  32
  33 #ifndef __cplusplus
  34 # include <stddef.h> /* for size_t definition */
  35 #else
  36 # include <cstddef>
  37 using std::size_t;
  38 #endif
  39
  40 #ifdef __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 /************************************************************************
  45  *
  46  * Version
  47  *
  48  ***********************************************************************/
  49
  50 /*
  51  * Following 'ifdef' hack fixes problem with generating geos_c.h on Windows,
  52  * when building with Visual C++ compiler.
  53  *
  54  */
  55 #if defined(_MSC_VER)
  56 #include <geos/version.h>
  57 #define GEOS_CAPI_VERSION_MAJOR 1
  58 #define GEOS_CAPI_VERSION_MINOR 6
  59 #define GEOS_CAPI_VERSION_PATCH 1
  60 #define GEOS_CAPI_VERSION "3.3.0-CAPI-1.7.0"
  61 #else
  62 #ifndef GEOS_VERSION_MAJOR
  63 #define GEOS_VERSION_MAJOR @VERSION_MAJOR@
  64 #endif
  65 #ifndef GEOS_VERSION_MINOR
  66 #define GEOS_VERSION_MINOR @VERSION_MINOR@
  67 #endif
  68 #ifndef GEOS_VERSION_PATCH
  69 #define GEOS_VERSION_PATCH @VERSION_PATCH@
  70 #endif
  71 #ifndef GEOS_VERSION
  72 #define GEOS_VERSION "@VERSION@"
  73 #endif
  74 #ifndef GEOS_JTS_PORT
  75 #define GEOS_JTS_PORT "@JTS_PORT@"
  76 #endif
  77
  78 #define GEOS_CAPI_VERSION_MAJOR @CAPI_VERSION_MAJOR@
  79 #define GEOS_CAPI_VERSION_MINOR @CAPI_VERSION_MINOR@
  80 #define GEOS_CAPI_VERSION_PATCH @CAPI_VERSION_PATCH@
  81 #define GEOS_CAPI_VERSION "@VERSION@-CAPI-@CAPI_VERSION@"
  82 #endif
  83
  84 #define GEOS_CAPI_FIRST_INTERFACE GEOS_CAPI_VERSION_MAJOR
  85 #define GEOS_CAPI_LAST_INTERFACE (GEOS_CAPI_VERSION_MAJOR+GEOS_CAPI_VERSION_MINOR)
  86
  87 /************************************************************************
  88  *
  89  * (Abstract) type definitions
  90  *
  91  ************************************************************************/
  92
  93 typedef void (*GEOSMessageHandler)(const char *fmt, ...);
  94
  95 /* When we're included by geos_c.cpp, those are #defined to the original
  96  * JTS definitions via preprocessor. We don't touch them to allow the
  97  * compiler to cross-check the declarations. However, for all "normal"
  98  * C-API users, we need to define them as "opaque" struct pointers, as
  99  * those clients don't have access to the original C++ headers, by design.
 100  */
 101 #ifndef GEOSGeometry
 102 typedef struct GEOSGeom_t GEOSGeometry;
 103 typedef struct GEOSPrepGeom_t GEOSPreparedGeometry;
 104 typedef struct GEOSCoordSeq_t GEOSCoordSequence;
 105 typedef struct GEOSSTRtree_t GEOSSTRtree;
 106 typedef struct GEOSBufParams_t GEOSBufferParams;
 107 #endif
 108
 109 /* Those are compatibility definitions for source compatibility
 110  * with GEOS 2.X clients relying on that type.
 111  */
 112 typedef GEOSGeometry* GEOSGeom;
 113 typedef GEOSCoordSequence* GEOSCoordSeq;
 114
 115 /* Supported geometry types
 116  * This was renamed from GEOSGeomTypeId in GEOS 2.2.X, which might
 117  * break compatibility, this issue is still under investigation.
 118  */
 119
 120 enum GEOSGeomTypes {
 121     GEOS_POINT,
 122     GEOS_LINESTRING,
 123     GEOS_LINEARRING,
 124     GEOS_POLYGON,
 125     GEOS_MULTIPOINT,
 126     GEOS_MULTILINESTRING,
 127     GEOS_MULTIPOLYGON,
 128     GEOS_GEOMETRYCOLLECTION
 129 };
 130
 131 /* Byte oders exposed via the c api */
 132 enum GEOSByteOrders {
 133     GEOS_WKB_XDR = 0, /* Big Endian */
 134     GEOS_WKB_NDR = 1 /* Little Endian */
 135 };
 136
 137 typedef struct GEOSContextHandle_HS *GEOSContextHandle_t;
 138
 139 typedef void (*GEOSQueryCallback)(void *item, void *userdata);
 140
 141 /************************************************************************
 142  *
 143  * Initialization, cleanup, version
 144  *
 145  ***********************************************************************/
 146
 147 #include <geos/export.h>
 148
 149 extern void GEOS_DLL initGEOS(GEOSMessageHandler notice_function,
 150         GEOSMessageHandler error_function);
 151 extern void GEOS_DLL finishGEOS(void);
 152
 153 extern GEOSContextHandle_t GEOS_DLL initGEOS_r(
 154                                     GEOSMessageHandler notice_function,
 155                                     GEOSMessageHandler error_function);
 156 extern void GEOS_DLL finishGEOS_r(GEOSContextHandle_t handle);
 157
 158 extern GEOSMessageHandler GEOS_DLL GEOSContext_setNoticeHandler_r(GEOSContextHandle_t extHandle,
 159                                                                   GEOSMessageHandler nf);
 160 extern GEOSMessageHandler GEOS_DLL GEOSContext_setErrorHandler_r(GEOSContextHandle_t extHandle,
 161                                                                  GEOSMessageHandler nf);
 162
 163 extern const char GEOS_DLL *GEOSversion();
 164
 165
 166 /************************************************************************
 167  *
 168  * NOTE - These functions are DEPRECATED.  Please use the new Reader and
 169  * writer APIS!
 170  *
 171  ***********************************************************************/
 172
 173 extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKT(const char *wkt);
 174 extern char GEOS_DLL *GEOSGeomToWKT(const GEOSGeometry* g);
 175
 176 extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKT_r(GEOSContextHandle_t handle,
 177                                                 const char *wkt);
 178 extern char GEOS_DLL *GEOSGeomToWKT_r(GEOSContextHandle_t handle,
 179                                       const GEOSGeometry* g);
 180
 181 /*
 182  * Specify whether output WKB should be 2d or 3d.
 183  * Return previously set number of dimensions.
 184  */
 185 extern int GEOS_DLL GEOS_getWKBOutputDims();
 186 extern int GEOS_DLL GEOS_setWKBOutputDims(int newDims);
 187
 188 extern int GEOS_DLL GEOS_getWKBOutputDims_r(GEOSContextHandle_t handle);
 189 extern int GEOS_DLL GEOS_setWKBOutputDims_r(GEOSContextHandle_t handle,
 190                                             int newDims);
 191
 192 /*
 193  * Specify whether the WKB byte order is big or little endian.
 194  * The return value is the previous byte order.
 195  */
 196 extern int GEOS_DLL GEOS_getWKBByteOrder();
 197 extern int GEOS_DLL GEOS_setWKBByteOrder(int byteOrder);
 198
 199 extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKB_buf(const unsigned char *wkb, size_t size);
 200 extern unsigned char GEOS_DLL *GEOSGeomToWKB_buf(const GEOSGeometry* g, size_t *size);
 201
 202 extern GEOSGeometry GEOS_DLL *GEOSGeomFromHEX_buf(const unsigned char *hex, size_t size);
 203 extern unsigned char GEOS_DLL *GEOSGeomToHEX_buf(const GEOSGeometry* g, size_t *size);
 204
 205 extern int GEOS_DLL GEOS_getWKBByteOrder_r(GEOSContextHandle_t handle);
 206 extern int GEOS_DLL GEOS_setWKBByteOrder_r(GEOSContextHandle_t handle,
 207                                            int byteOrder);
 208
 209 extern GEOSGeometry GEOS_DLL *GEOSGeomFromWKB_buf_r(GEOSContextHandle_t handle,
 210                                                     const unsigned char *wkb,
 211                                                     size_t size);
 212 extern unsigned char GEOS_DLL *GEOSGeomToWKB_buf_r(GEOSContextHandle_t handle,
 213                                                    const GEOSGeometry* g,
 214                                                    size_t *size);
 215
 216 extern GEOSGeometry GEOS_DLL *GEOSGeomFromHEX_buf_r(GEOSContextHandle_t handle,
 217                                                     const unsigned char *hex,
 218                                                     size_t size);
 219 extern unsigned char GEOS_DLL *GEOSGeomToHEX_buf_r(GEOSContextHandle_t handle,
 220                                                    const GEOSGeometry* g,
 221                                                    size_t *size);
 222
 223 /************************************************************************
 224  *
 225  * Coordinate Sequence functions
 226  *
 227  ***********************************************************************/
 228
 229 /*
 230  * Create a Coordinate sequence with ``size'' coordinates
 231  * of ``dims'' dimensions.
 232  * Return NULL on exception.
 233  */
 234 extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_create(unsigned int size, unsigned int dims);
 235
 236 extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_create_r(
 237                                                 GEOSContextHandle_t handle,
 238                                                 unsigned int size,
 239                                                 unsigned int dims);
 240
 241 /*
 242  * Clone a Coordinate Sequence.
 243  * Return NULL on exception.
 244  */
 245 extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_clone(const GEOSCoordSequence* s);
 246
 247 extern GEOSCoordSequence GEOS_DLL *GEOSCoordSeq_clone_r(
 248                                                 GEOSContextHandle_t handle,
 249                                                 const GEOSCoordSequence* s);
 250
 251 /*
 252  * Destroy a Coordinate Sequence.
 253  */
 254 extern void GEOS_DLL GEOSCoordSeq_destroy(GEOSCoordSequence* s);
 255
 256 extern void GEOS_DLL GEOSCoordSeq_destroy_r(GEOSContextHandle_t handle,
 257                                             GEOSCoordSequence* s);
 258
 259 /*
 260  * Set ordinate values in a Coordinate Sequence.
 261  * Return 0 on exception.
 262  */
 263 extern int GEOS_DLL GEOSCoordSeq_setX(GEOSCoordSequence* s,
 264         unsigned int idx, double val);
 265 extern int GEOS_DLL GEOSCoordSeq_setY(GEOSCoordSequence* s,
 266         unsigned int idx, double val);
 267 extern int GEOS_DLL GEOSCoordSeq_setZ(GEOSCoordSequence* s,
 268         unsigned int idx, double val);
 269 extern int GEOS_DLL GEOSCoordSeq_setOrdinate(GEOSCoordSequence* s,
 270         unsigned int idx, unsigned int dim, double val);
 271
 272 extern int GEOS_DLL GEOSCoordSeq_setX_r(GEOSContextHandle_t handle,
 273                                         GEOSCoordSequence* s, unsigned int idx,
 274                                         double val);
 275 extern int GEOS_DLL GEOSCoordSeq_setY_r(GEOSContextHandle_t handle,
 276                                         GEOSCoordSequence* s, unsigned int idx,
 277                                         double val);
 278 extern int GEOS_DLL GEOSCoordSeq_setZ_r(GEOSContextHandle_t handle,
 279                                         GEOSCoordSequence* s, unsigned int idx,
 280                                         double val);
 281 extern int GEOS_DLL GEOSCoordSeq_setOrdinate_r(GEOSContextHandle_t handle,
 282                                                GEOSCoordSequence* s,
 283                                                unsigned int idx,
 284                                                unsigned int dim, double val);
 285
 286 /*
 287  * Get ordinate values from a Coordinate Sequence.
 288  * Return 0 on exception.
 289  */
 290 extern int GEOS_DLL GEOSCoordSeq_getX(const GEOSCoordSequence* s,
 291         unsigned int idx, double *val);
 292 extern int GEOS_DLL GEOSCoordSeq_getY(const GEOSCoordSequence* s,
 293         unsigned int idx, double *val);
 294 extern int GEOS_DLL GEOSCoordSeq_getZ(const GEOSCoordSequence* s,
 295         unsigned int idx, double *val);
 296 extern int GEOS_DLL GEOSCoordSeq_getOrdinate(const GEOSCoordSequence* s,
 297         unsigned int idx, unsigned int dim, double *val);
 298
 299 extern int GEOS_DLL GEOSCoordSeq_getX_r(GEOSContextHandle_t handle,
 300                                         const GEOSCoordSequence* s,
 301                                         unsigned int idx, double *val);
 302 extern int GEOS_DLL GEOSCoordSeq_getY_r(GEOSContextHandle_t handle,
 303                                         const GEOSCoordSequence* s,
 304                                         unsigned int idx, double *val);
 305 extern int GEOS_DLL GEOSCoordSeq_getZ_r(GEOSContextHandle_t handle,
 306                                         const GEOSCoordSequence* s,
 307                                         unsigned int idx, double *val);
 308 extern int GEOS_DLL GEOSCoordSeq_getOrdinate_r(GEOSContextHandle_t handle,
 309                                                const GEOSCoordSequence* s,
 310                                                unsigned int idx,
 311                                                unsigned int dim, double *val);
 312 /*
 313  * Get size and dimensions info from a Coordinate Sequence.
 314  * Return 0 on exception.
 315  */
 316 extern int GEOS_DLL GEOSCoordSeq_getSize(const GEOSCoordSequence* s,
 317         unsigned int *size);
 318 extern int GEOS_DLL GEOSCoordSeq_getDimensions(const GEOSCoordSequence* s,
 319         unsigned int *dims);
 320
 321 extern int GEOS_DLL GEOSCoordSeq_getSize_r(GEOSContextHandle_t handle,
 322                                            const GEOSCoordSequence* s,
 323                                            unsigned int *size);
 324 extern int GEOS_DLL GEOSCoordSeq_getDimensions_r(GEOSContextHandle_t handle,
 325                                                  const GEOSCoordSequence* s,
 326                                                  unsigned int *dims);
 327
 328 /************************************************************************
 329  *
 330  *  Linearref functions -- there are more, but these two are probably
 331  *  sufficient for most purposes
 332  *
 333  ***********************************************************************/
 334
 335 /*
 336  * GEOSGeometry ownership is retained by caller
 337  */
 338
 339
 340 /* Return distance of point 'p' projected on 'g' from origin
 341  * of 'g'. Geometry 'g' must be a lineal geometry */
 342 extern double GEOS_DLL GEOSProject(const GEOSGeometry *g,
 343                                    const GEOSGeometry* p);
 344 extern double GEOS_DLL GEOSProject_r(GEOSContextHandle_t handle,
 345                                      const GEOSGeometry *g,
 346                                      const GEOSGeometry *p);
 347
 348 /* Return closest point to given distance within geometry
 349  * Geometry must be a LineString */
 350 extern GEOSGeometry GEOS_DLL *GEOSInterpolate(const GEOSGeometry *g,
 351                                               double d);
 352 extern GEOSGeometry GEOS_DLL *GEOSInterpolate_r(GEOSContextHandle_t handle,
 353                                                 const GEOSGeometry *g,
 354                                                 double d);
 355
 356 extern double GEOS_DLL GEOSProjectNormalized(const GEOSGeometry *g,
 357                                              const GEOSGeometry* p);
 358 extern double GEOS_DLL GEOSProjectNormalized_r(GEOSContextHandle_t handle,
 359                                                const GEOSGeometry *g,
 360                                                const GEOSGeometry *p);
 361
 362 extern GEOSGeometry GEOS_DLL *GEOSInterpolateNormalized(const GEOSGeometry *g,
 363                                                         double d);
 364 extern GEOSGeometry GEOS_DLL *GEOSInterpolateNormalized_r(
 365                                                 GEOSContextHandle_t handle,
 366                                                 const GEOSGeometry *g,
 367                                                 double d);
 368
 369 /************************************************************************
 370  *
 371  * Buffer related functions
 372  *
 373  ***********************************************************************/
 374
 375 enum GEOSBufCapStyles {
 376         GEOSBUF_CAP_ROUND=1,
 377         GEOSBUF_CAP_FLAT=2,
 378         GEOSBUF_CAP_SQUARE=3
 379 };
 380
 381 enum GEOSBufJoinStyles {
 382         GEOSBUF_JOIN_ROUND=1,
 383         GEOSBUF_JOIN_MITRE=2,
 384         GEOSBUF_JOIN_BEVEL=3
 385 };
 386
 387 /* @return 0 on exception */
 388 extern GEOSBufferParams GEOS_DLL *GEOSBufferParams_create();
 389 extern GEOSBufferParams GEOS_DLL *GEOSBufferParams_create_r(
 390                                               GEOSContextHandle_t handle);
 391 extern void GEOS_DLL GEOSBufferParams_destroy(GEOSBufferParams* parms);
 392 extern void GEOS_DLL GEOSBufferParams_destroy_r(
 393                                               GEOSContextHandle_t handle,
 394                                               GEOSBufferParams* parms);
 395
 396 /* @return 0 on exception */
 397 extern int GEOS_DLL GEOSBufferParams_setEndCapStyle(
 398                                               GEOSBufferParams* p,
 399                                               int style);
 400 extern int GEOS_DLL GEOSBufferParams_setEndCapStyle_r(
 401                                               GEOSContextHandle_t handle,
 402                                               GEOSBufferParams* p,
 403                                               int style);
 404
 405 /* @return 0 on exception */
 406 extern int GEOS_DLL GEOSBufferParams_setJoinStyle(
 407                                               GEOSBufferParams* p,
 408                                               int joinStyle);
 409 extern int GEOS_DLL GEOSBufferParams_setJoinStyle_r(
 410                                               GEOSContextHandle_t handle,
 411                                               GEOSBufferParams* p,
 412                                               int joinStyle);
 413
 414 /* @return 0 on exception */
 415 extern int GEOS_DLL GEOSBufferParams_setMitreLimit(
 416                                               GEOSBufferParams* p,
 417                                               double mitreLimit);
 418 extern int GEOS_DLL GEOSBufferParams_setMitreLimit_r(
 419                                               GEOSContextHandle_t handle,
 420                                               GEOSBufferParams* p,
 421                                               double mitreLimit);
 422
 423 /* @return 0 on exception */
 424 extern int GEOS_DLL GEOSBufferParams_setQuadrantSegments(
 425                                               GEOSBufferParams* p,
 426                                               int quadSegs);
 427 extern int GEOS_DLL GEOSBufferParams_setQuadrantSegments_r(
 428                                               GEOSContextHandle_t handle,
 429                                               GEOSBufferParams* p,
 430                                               int quadSegs);
 431
 432 /* @param singleSided: 1 for single sided, 0 otherwise */
 433 /* @return 0 on exception */
 434 extern int GEOS_DLL GEOSBufferParams_setSingleSided(
 435                                               GEOSBufferParams* p,
 436                                               int singleSided);
 437 extern int GEOS_DLL GEOSBufferParams_setSingleSided_r(
 438                                               GEOSContextHandle_t handle,
 439                                               GEOSBufferParams* p,
 440                                               int singleSided);
 441
 442 /* @return NULL on exception. */
 443 extern GEOSGeometry GEOS_DLL *GEOSBufferWithParams(
 444                                               const GEOSGeometry* g1,
 445                                               const GEOSBufferParams* p,
 446                                               double width);
 447 extern GEOSGeometry GEOS_DLL *GEOSBufferWithParams_r(
 448                                               GEOSContextHandle_t handle,
 449                                               const GEOSGeometry* g1,
 450                                               const GEOSBufferParams* p,
 451                                               double width);
 452
 453 /* These functions return NULL on exception. */
 454 extern GEOSGeometry GEOS_DLL *GEOSBuffer(const GEOSGeometry* g1,
 455         double width, int quadsegs);
 456 extern GEOSGeometry GEOS_DLL *GEOSBuffer_r(GEOSContextHandle_t handle,
 457                                            const GEOSGeometry* g1,
 458                                            double width, int quadsegs);
 459
 460 /* These functions return NULL on exception. */
 461 extern GEOSGeometry GEOS_DLL *GEOSBufferWithStyle(const GEOSGeometry* g1,
 462         double width, int quadsegs, int endCapStyle, int joinStyle,
 463         double mitreLimit);
 464 extern GEOSGeometry GEOS_DLL *GEOSBufferWithStyle_r(GEOSContextHandle_t handle,
 465         const GEOSGeometry* g1, double width, int quadsegs, int endCapStyle,
 466         int joinStyle, double mitreLimit);
 467
 468 /* These functions return NULL on exception. Only LINESTRINGs are accepted. */
 469 /* @deprecated in 3.3.0: use GEOSOffsetCurve instead */
 470 extern GEOSGeometry GEOS_DLL *GEOSSingleSidedBuffer(const GEOSGeometry* g1,
 471         double width, int quadsegs, int joinStyle, double mitreLimit,
 472         int leftSide);
 473 extern GEOSGeometry GEOS_DLL *GEOSSingleSidedBuffer_r(
 474         GEOSContextHandle_t handle,
 475         const GEOSGeometry* g1, double width, int quadsegs,
 476         int joinStyle, double mitreLimit, int leftSide);
 477
 478 /*
 479  * Only LINESTRINGs are accepted.
 480  * @param width : offset distance.
 481  *                negative for right side offset.
 482  *                positive for left side offset.
 483  * @return NULL on exception
 484  */
 485 extern GEOSGeometry GEOS_DLL *GEOSOffsetCurve(const GEOSGeometry* g1,
 486         double width, int quadsegs, int joinStyle, double mitreLimit);
 487 extern GEOSGeometry GEOS_DLL *GEOSOffsetCurve_r(GEOSContextHandle_t handle,
 488         const GEOSGeometry* g1, double width, int quadsegs,
 489         int joinStyle, double mitreLimit);
 490
 491
 492 /************************************************************************
 493  *
 494  * Geometry Constructors.
 495  * GEOSCoordSequence* arguments will become ownership of the returned object.
 496  * All functions return NULL on exception.
 497  *
 498  ***********************************************************************/
 499
 500 extern GEOSGeometry GEOS_DLL *GEOSGeom_createPoint(GEOSCoordSequence* s);
 501 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPoint();
 502 extern GEOSGeometry GEOS_DLL *GEOSGeom_createLinearRing(GEOSCoordSequence* s);
 503 extern GEOSGeometry GEOS_DLL *GEOSGeom_createLineString(GEOSCoordSequence* s);
 504 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyLineString();
 505
 506 extern GEOSGeometry GEOS_DLL *GEOSGeom_createPoint_r(
 507                                        GEOSContextHandle_t handle,
 508                                        GEOSCoordSequence* s);
 509 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPoint_r(
 510                                        GEOSContextHandle_t handle);
 511 extern GEOSGeometry GEOS_DLL *GEOSGeom_createLinearRing_r(
 512                                        GEOSContextHandle_t handle,
 513                                        GEOSCoordSequence* s);
 514 extern GEOSGeometry GEOS_DLL *GEOSGeom_createLineString_r(
 515                                        GEOSContextHandle_t handle,
 516                                        GEOSCoordSequence* s);
 517 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyLineString_r(
 518                                        GEOSContextHandle_t handle);
 519
 520 /*
 521  * Second argument is an array of GEOSGeometry* objects.
 522  * The caller remains owner of the array, but pointed-to
 523  * objects become ownership of the returned GEOSGeometry.
 524  */
 525 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPolygon();
 526 extern GEOSGeometry GEOS_DLL *GEOSGeom_createPolygon(GEOSGeometry* shell,
 527         GEOSGeometry** holes, unsigned int nholes);
 528 extern GEOSGeometry GEOS_DLL *GEOSGeom_createCollection(int type,
 529         GEOSGeometry* *geoms, unsigned int ngeoms);
 530 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyCollection(int type);
 531
 532 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyPolygon_r(
 533                                        GEOSContextHandle_t handle);
 534 extern GEOSGeometry GEOS_DLL *GEOSGeom_createPolygon_r(
 535                                        GEOSContextHandle_t handle,
 536                                        GEOSGeometry* shell,
 537                                        GEOSGeometry** holes,
 538                                        unsigned int nholes);
 539 extern GEOSGeometry GEOS_DLL *GEOSGeom_createCollection_r(
 540                                        GEOSContextHandle_t handle, int type,
 541                                        GEOSGeometry* *geoms,
 542                                        unsigned int ngeoms);
 543 extern GEOSGeometry GEOS_DLL *GEOSGeom_createEmptyCollection_r(
 544                                        GEOSContextHandle_t handle, int type);
 545
 546 extern GEOSGeometry GEOS_DLL *GEOSGeom_clone(const GEOSGeometry* g);
 547
 548 extern GEOSGeometry GEOS_DLL *GEOSGeom_clone_r(GEOSContextHandle_t handle,
 549                                                const GEOSGeometry* g);
 550
 551 /************************************************************************
 552  *
 553  * Memory management
 554  *
 555  ***********************************************************************/
 556
 557 extern void GEOS_DLL GEOSGeom_destroy(GEOSGeometry* g);
 558
 559 extern void GEOS_DLL GEOSGeom_destroy_r(GEOSContextHandle_t handle,
 560                                         GEOSGeometry* g);
 561
 562 /************************************************************************
 563  *
 564  * Topology operations - return NULL on exception.
 565  *
 566  ***********************************************************************/
 567
 568 extern GEOSGeometry GEOS_DLL *GEOSEnvelope(const GEOSGeometry* g1);
 569 extern GEOSGeometry GEOS_DLL *GEOSIntersection(const GEOSGeometry* g1, const GEOSGeometry* g2);
 570 extern GEOSGeometry GEOS_DLL *GEOSConvexHull(const GEOSGeometry* g1);
 571 extern GEOSGeometry GEOS_DLL *GEOSDifference(const GEOSGeometry* g1, const GEOSGeometry* g2);
 572 extern GEOSGeometry GEOS_DLL *GEOSSymDifference(const GEOSGeometry* g1,
 573         const GEOSGeometry* g2);
 574 extern GEOSGeometry GEOS_DLL *GEOSBoundary(const GEOSGeometry* g1);
 575 extern GEOSGeometry GEOS_DLL *GEOSUnion(const GEOSGeometry* g1, const GEOSGeometry* g2);
 576 extern GEOSGeometry GEOS_DLL *GEOSUnaryUnion(const GEOSGeometry* g1);
 577
 578 /* @deprecated in 3.3.0: use GEOSUnaryUnion instead */
 579 extern GEOSGeometry GEOS_DLL *GEOSUnionCascaded(const GEOSGeometry* g1);
 580 extern GEOSGeometry GEOS_DLL *GEOSUnionCascaded_r(GEOSContextHandle_t handle, const GEOSGeometry* g1);
 581
 582 extern GEOSGeometry GEOS_DLL *GEOSPointOnSurface(const GEOSGeometry* g1);
 583 extern GEOSGeometry GEOS_DLL *GEOSGetCentroid(const GEOSGeometry* g);
 584
 585 extern GEOSGeometry GEOS_DLL *GEOSEnvelope_r(GEOSContextHandle_t handle,
 586                                              const GEOSGeometry* g1);
 587 extern GEOSGeometry GEOS_DLL *GEOSIntersection_r(GEOSContextHandle_t handle,
 588                                                  const GEOSGeometry* g1,
 589                                                  const GEOSGeometry* g2);
 590 extern GEOSGeometry GEOS_DLL *GEOSConvexHull_r(GEOSContextHandle_t handle,
 591                                                const GEOSGeometry* g1);
 592 extern GEOSGeometry GEOS_DLL *GEOSDifference_r(GEOSContextHandle_t handle,
 593                                                const GEOSGeometry* g1,
 594                                                const GEOSGeometry* g2);
 595 extern GEOSGeometry GEOS_DLL *GEOSSymDifference_r(GEOSContextHandle_t handle,
 596                                                   const GEOSGeometry* g1,
 597                                                   const GEOSGeometry* g2);
 598 extern GEOSGeometry GEOS_DLL *GEOSBoundary_r(GEOSContextHandle_t handle,
 599                                              const GEOSGeometry* g1);
 600 extern GEOSGeometry GEOS_DLL *GEOSUnion_r(GEOSContextHandle_t handle,
 601                                           const GEOSGeometry* g1,
 602                                           const GEOSGeometry* g2);
 603 extern GEOSGeometry GEOS_DLL *GEOSUnaryUnion_r(GEOSContextHandle_t handle,
 604                                           const GEOSGeometry* g);
 605 extern GEOSGeometry GEOS_DLL *GEOSPointOnSurface_r(GEOSContextHandle_t handle,
 606                                                    const GEOSGeometry* g1);
 607 extern GEOSGeometry GEOS_DLL *GEOSGetCentroid_r(GEOSContextHandle_t handle,
 608                                                 const GEOSGeometry* g);
 609
 610 /*
 611  * all arguments remain ownership of the caller
 612  * (both Geometries and pointers)
 613  */
 614 extern GEOSGeometry GEOS_DLL *GEOSPolygonize(const GEOSGeometry * const geoms[], unsigned int ngeoms);
 615 extern GEOSGeometry GEOS_DLL *GEOSPolygonizer_getCutEdges(const GEOSGeometry * const geoms[], unsigned int ngeoms);
 616 /*
 617  * Polygonizes a set of Geometrys which contain linework that
 618  * represents the edges of a planar graph.
 619  *
 620  * Any dimension of Geometry is handled - the constituent linework
 621  * is extracted to form the edges.
 622  *
 623  * The edges must be correctly noded; that is, they must only meet
 624  * at their endpoints.
 625  * The Polygonizer will still run on incorrectly noded input
 626  * but will not form polygons from incorrected noded edges.
 627  *
 628  * The Polygonizer reports the follow kinds of errors:
 629  *
 630  * - Dangles - edges which have one or both ends which are
 631  *   not incident on another edge endpoint
 632  * - Cut Edges - edges which are connected at both ends but
 633  *   which do not form part of polygon
 634  * - Invalid Ring Lines - edges which form rings which are invalid
 635  *   (e.g. the component lines contain a self-intersection)
 636  *
 637  * Errors are reported to output parameters "cuts", "dangles" and
 638  * "invalid" (if not-null). Formed polygons are returned as a
 639  * collection. NULL is returned on exception. All returned
 640  * geometries must be destroyed by caller.
 641  *
 642  */
 643 extern GEOSGeometry GEOS_DLL *GEOSPolygonize_full(const GEOSGeometry* input,
 644         GEOSGeometry** cuts, GEOSGeometry** dangles, GEOSGeometry** invalid);
 645
 646 extern GEOSGeometry GEOS_DLL *GEOSLineMerge(const GEOSGeometry* g);
 647 extern GEOSGeometry GEOS_DLL *GEOSSimplify(const GEOSGeometry* g1, double tolerance);
 648 extern GEOSGeometry GEOS_DLL *GEOSTopologyPreserveSimplify(const GEOSGeometry* g1,
 649         double tolerance);
 650
 651 extern GEOSGeometry GEOS_DLL *GEOSPolygonize_r(GEOSContextHandle_t handle,
 652                               const GEOSGeometry *const geoms[],
 653                               unsigned int ngeoms);
 654 extern GEOSGeometry GEOS_DLL *GEOSPolygonizer_getCutEdges_r(
 655                               GEOSContextHandle_t handle,
 656                               const GEOSGeometry * const geoms[],
 657                               unsigned int ngeoms);
 658 extern GEOSGeometry GEOS_DLL *GEOSPolygonize_full_r(GEOSContextHandle_t handle,
 659                               const GEOSGeometry* input, GEOSGeometry** cuts,
 660                               GEOSGeometry** dangles, GEOSGeometry** invalidRings);
 661
 662 extern GEOSGeometry GEOS_DLL *GEOSLineMerge_r(GEOSContextHandle_t handle,
 663                                               const GEOSGeometry* g);
 664 extern GEOSGeometry GEOS_DLL *GEOSSimplify_r(GEOSContextHandle_t handle,
 665                                              const GEOSGeometry* g1,
 666                                              double tolerance);
 667 extern GEOSGeometry GEOS_DLL *GEOSTopologyPreserveSimplify_r(
 668                               GEOSContextHandle_t handle,
 669                               const GEOSGeometry* g1, double tolerance);
 670
 671 /*
 672  * Return all distinct vertices of input geometry as a MULTIPOINT.
 673  * Note that only 2 dimensions of the vertices are considered when
 674  * testing for equality.
 675  */
 676 extern GEOSGeometry GEOS_DLL *GEOSGeom_extractUniquePoints(
 677                               const GEOSGeometry* g);
 678 extern GEOSGeometry GEOS_DLL *GEOSGeom_extractUniquePoints_r(
 679                               GEOSContextHandle_t handle,
 680                               const GEOSGeometry* g);
 681
 682 /*
 683  * Find paths shared between the two given lineal geometries.
 684  *
 685  * Returns a GEOMETRYCOLLECTION having two elements:
 686  * - first element is a MULTILINESTRING containing shared paths
 687  *   having the _same_ direction on both inputs
 688  * - second element is a MULTILINESTRING containing shared paths
 689  *   having the _opposite_ direction on the two inputs
 690  *
 691  * Returns NULL on exception
 692  */
 693 extern GEOSGeometry GEOS_DLL *GEOSSharedPaths(const GEOSGeometry* g1,
 694   const GEOSGeometry* g2);
 695 extern GEOSGeometry GEOS_DLL *GEOSSharedPaths_r(GEOSContextHandle_t handle,
 696   const GEOSGeometry* g1, const GEOSGeometry* g2);
 697
 698 /*
 699  * Snap first geometry on to second with given tolerance
 700  * Returns a newly allocated geometry, or NULL on exception
 701  */
 702 extern GEOSGeometry GEOS_DLL *GEOSSnap(const GEOSGeometry* g1,
 703   const GEOSGeometry* g2, double tolerance);
 704 extern GEOSGeometry GEOS_DLL *GEOSSnap_r(GEOSContextHandle_t handle,
 705   const GEOSGeometry* g1, const GEOSGeometry* g2, double tolerance);
 706
 707 /************************************************************************
 708  *
 709  *  Binary predicates - return 2 on exception, 1 on true, 0 on false
 710  *
 711  ***********************************************************************/
 712
 713 extern char GEOS_DLL GEOSDisjoint(const GEOSGeometry* g1, const GEOSGeometry* g2);
 714 extern char GEOS_DLL GEOSTouches(const GEOSGeometry* g1, const GEOSGeometry* g2);
 715 extern char GEOS_DLL GEOSIntersects(const GEOSGeometry* g1, const GEOSGeometry* g2);
 716 extern char GEOS_DLL GEOSCrosses(const GEOSGeometry* g1, const GEOSGeometry* g2);
 717 extern char GEOS_DLL GEOSWithin(const GEOSGeometry* g1, const GEOSGeometry* g2);
 718 extern char GEOS_DLL GEOSContains(const GEOSGeometry* g1, const GEOSGeometry* g2);
 719 extern char GEOS_DLL GEOSOverlaps(const GEOSGeometry* g1, const GEOSGeometry* g2);
 720 extern char GEOS_DLL GEOSEquals(const GEOSGeometry* g1, const GEOSGeometry* g2);
 721 extern char GEOS_DLL GEOSEqualsExact(const GEOSGeometry* g1, const GEOSGeometry* g2, double tolerance);
 722 extern char GEOS_DLL GEOSCovers(const GEOSGeometry* g1, const GEOSGeometry* g2);
 723 extern char GEOS_DLL GEOSCoveredBy(const GEOSGeometry* g1, const GEOSGeometry* g2);
 724
 725 extern char GEOS_DLL GEOSDisjoint_r(GEOSContextHandle_t handle,
 726                                     const GEOSGeometry* g1,
 727                                     const GEOSGeometry* g2);
 728 extern char GEOS_DLL GEOSTouches_r(GEOSContextHandle_t handle,
 729                                    const GEOSGeometry* g1,
 730                                    const GEOSGeometry* g2);
 731 extern char GEOS_DLL GEOSIntersects_r(GEOSContextHandle_t handle,
 732                                       const GEOSGeometry* g1,
 733                                       const GEOSGeometry* g2);
 734 extern char GEOS_DLL GEOSCrosses_r(GEOSContextHandle_t handle,
 735                                    const GEOSGeometry* g1,
 736                                    const GEOSGeometry* g2);
 737 extern char GEOS_DLL GEOSWithin_r(GEOSContextHandle_t handle,
 738                                   const GEOSGeometry* g1,
 739                                   const GEOSGeometry* g2);
 740 extern char GEOS_DLL GEOSContains_r(GEOSContextHandle_t handle,
 741                                     const GEOSGeometry* g1,
 742                                     const GEOSGeometry* g2);
 743 extern char GEOS_DLL GEOSOverlaps_r(GEOSContextHandle_t handle,
 744                                     const GEOSGeometry* g1,
 745                                     const GEOSGeometry* g2);
 746 extern char GEOS_DLL GEOSEquals_r(GEOSContextHandle_t handle,
 747                                   const GEOSGeometry* g1,
 748                                   const GEOSGeometry* g2);
 749 extern char GEOS_DLL GEOSEqualsExact_r(GEOSContextHandle_t handle,
 750                                        const GEOSGeometry* g1,
 751                                        const GEOSGeometry* g2,
 752                                        double tolerance);
 753 extern char GEOS_DLL GEOSCovers_r(GEOSContextHandle_t handle,
 754                                   const GEOSGeometry* g1,
 755                                   const GEOSGeometry* g2);
 756 extern char GEOS_DLL GEOSCoveredBy_r(GEOSContextHandle_t handle,
 757                                   const GEOSGeometry* g1,
 758                                   const GEOSGeometry* g2);
 759
 760 /************************************************************************
 761  *
 762  *  Prepared Geometry Binary predicates - return 2 on exception, 1 on true, 0 on false
 763  *
 764  ***********************************************************************/
 765
 766 /*
 767  * GEOSGeometry ownership is retained by caller
 768  */
 769 extern const GEOSPreparedGeometry GEOS_DLL *GEOSPrepare(const GEOSGeometry* g);
 770
 771 extern void GEOS_DLL GEOSPreparedGeom_destroy(const GEOSPreparedGeometry* g);
 772
 773 extern char GEOS_DLL GEOSPreparedContains(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 774 extern char GEOS_DLL GEOSPreparedContainsProperly(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 775 extern char GEOS_DLL GEOSPreparedCoveredBy(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 776 extern char GEOS_DLL GEOSPreparedCovers(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 777 extern char GEOS_DLL GEOSPreparedCrosses(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 778 extern char GEOS_DLL GEOSPreparedDisjoint(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 779 extern char GEOS_DLL GEOSPreparedIntersects(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 780 extern char GEOS_DLL GEOSPreparedOverlaps(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 781 extern char GEOS_DLL GEOSPreparedTouches(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 782 extern char GEOS_DLL GEOSPreparedWithin(const GEOSPreparedGeometry* pg1, const GEOSGeometry* g2);
 783
 784 /*
 785  * GEOSGeometry ownership is retained by caller
 786  */
 787 extern const GEOSPreparedGeometry GEOS_DLL *GEOSPrepare_r(
 788                                             GEOSContextHandle_t handle,
 789                                             const GEOSGeometry* g);
 790
 791 extern void GEOS_DLL GEOSPreparedGeom_destroy_r(GEOSContextHandle_t handle,
 792                                                 const GEOSPreparedGeometry* g);
 793
 794 extern char GEOS_DLL GEOSPreparedContains_r(GEOSContextHandle_t handle,
 795                                             const GEOSPreparedGeometry* pg1,
 796                                             const GEOSGeometry* g2);
 797 extern char GEOS_DLL GEOSPreparedContainsProperly_r(GEOSContextHandle_t handle,
 798                                          const GEOSPreparedGeometry* pg1,
 799                                          const GEOSGeometry* g2);
 800 extern char GEOS_DLL GEOSPreparedCoveredBy_r(GEOSContextHandle_t handle,
 801                                           const GEOSPreparedGeometry* pg1,
 802                                           const GEOSGeometry* g2);
 803 extern char GEOS_DLL GEOSPreparedCovers_r(GEOSContextHandle_t handle,
 804                                           const GEOSPreparedGeometry* pg1,
 805                                           const GEOSGeometry* g2);
 806 extern char GEOS_DLL GEOSPreparedCrosses_r(GEOSContextHandle_t handle,
 807                                           const GEOSPreparedGeometry* pg1,
 808                                           const GEOSGeometry* g2);
 809 extern char GEOS_DLL GEOSPreparedDisjoint_r(GEOSContextHandle_t handle,
 810                                           const GEOSPreparedGeometry* pg1,
 811                                           const GEOSGeometry* g2);
 812 extern char GEOS_DLL GEOSPreparedIntersects_r(GEOSContextHandle_t handle,
 813                                               const GEOSPreparedGeometry* pg1,
 814                                               const GEOSGeometry* g2);
 815 extern char GEOS_DLL GEOSPreparedOverlaps_r(GEOSContextHandle_t handle,
 816                                           const GEOSPreparedGeometry* pg1,
 817                                           const GEOSGeometry* g2);
 818 extern char GEOS_DLL GEOSPreparedTouches_r(GEOSContextHandle_t handle,
 819                                           const GEOSPreparedGeometry* pg1,
 820                                           const GEOSGeometry* g2);
 821 extern char GEOS_DLL GEOSPreparedWithin_r(GEOSContextHandle_t handle,
 822                                           const GEOSPreparedGeometry* pg1,
 823                                           const GEOSGeometry* g2);
 824
 825 /************************************************************************
 826  *
 827  *  STRtree functions
 828  *
 829  ***********************************************************************/
 830
 831 /*
 832  * GEOSGeometry ownership is retained by caller
 833  */
 834
 835 extern GEOSSTRtree GEOS_DLL *GEOSSTRtree_create(size_t nodeCapacity);
 836 extern void GEOS_DLL GEOSSTRtree_insert(GEOSSTRtree *tree,
 837                                         const GEOSGeometry *g,
 838                                         void *item);
 839 extern void GEOS_DLL GEOSSTRtree_query(GEOSSTRtree *tree,
 840                                        const GEOSGeometry *g,
 841                                        GEOSQueryCallback callback,
 842                                        void *userdata);
 843 extern void GEOS_DLL GEOSSTRtree_iterate(GEOSSTRtree *tree,
 844                                        GEOSQueryCallback callback,
 845                                        void *userdata);
 846 extern char GEOS_DLL GEOSSTRtree_remove(GEOSSTRtree *tree,
 847                                         const GEOSGeometry *g,
 848                                         void *item);
 849 extern void GEOS_DLL GEOSSTRtree_destroy(GEOSSTRtree *tree);
 850
 851
 852 extern GEOSSTRtree GEOS_DLL *GEOSSTRtree_create_r(
 853                                     GEOSContextHandle_t handle,
 854                                     size_t nodeCapacity);
 855 extern void GEOS_DLL GEOSSTRtree_insert_r(GEOSContextHandle_t handle,
 856                                           GEOSSTRtree *tree,
 857                                           const GEOSGeometry *g,
 858                                           void *item);
 859 extern void GEOS_DLL GEOSSTRtree_query_r(GEOSContextHandle_t handle,
 860                                          GEOSSTRtree *tree,
 861                                          const GEOSGeometry *g,
 862                                          GEOSQueryCallback callback,
 863                                          void *userdata);
 864 extern void GEOS_DLL GEOSSTRtree_iterate_r(GEOSContextHandle_t handle,
 865                                        GEOSSTRtree *tree,
 866                                        GEOSQueryCallback callback,
 867                                        void *userdata);
 868 extern char GEOS_DLL GEOSSTRtree_remove_r(GEOSContextHandle_t handle,
 869                                           GEOSSTRtree *tree,
 870                                           const GEOSGeometry *g,
 871                                           void *item);
 872 extern void GEOS_DLL GEOSSTRtree_destroy_r(GEOSContextHandle_t handle,
 873                                            GEOSSTRtree *tree);
 874
 875
 876 /************************************************************************
 877  *
 878  *  Unary predicate - return 2 on exception, 1 on true, 0 on false
 879  *
 880  ***********************************************************************/
 881
 882 extern char GEOS_DLL GEOSisEmpty(const GEOSGeometry* g1);
 883 extern char GEOS_DLL GEOSisSimple(const GEOSGeometry* g1);
 884 extern char GEOS_DLL GEOSisRing(const GEOSGeometry* g1);
 885 extern char GEOS_DLL GEOSHasZ(const GEOSGeometry* g1);
 886 extern char GEOS_DLL GEOSisClosed(const GEOSGeometry *g1);
 887
 888 extern char GEOS_DLL GEOSisEmpty_r(GEOSContextHandle_t handle,
 889                                    const GEOSGeometry* g1);
 890 extern char GEOS_DLL GEOSisSimple_r(GEOSContextHandle_t handle,
 891                                     const GEOSGeometry* g1);
 892 extern char GEOS_DLL GEOSisRing_r(GEOSContextHandle_t handle,
 893                                   const GEOSGeometry* g1);
 894 extern char GEOS_DLL GEOSHasZ_r(GEOSContextHandle_t handle,
 895                                 const GEOSGeometry* g1);
 896 extern char GEOS_DLL GEOSisClosed_r(GEOSContextHandle_t handle,
 897                                 const GEOSGeometry *g1);
 898
 899 /************************************************************************
 900  *
 901  *  Dimensionally Extended 9 Intersection Model related
 902  *
 903  ***********************************************************************/
 904
 905 /* These are for use with GEOSRelateBoundaryNodeRule (flags param) */
 906 enum GEOSRelateBoundaryNodeRules {
 907         /* MOD2 and OGC are the same rule, and is the default
 908          * used by GEOSRelatePattern
 909          */
 910         GEOSRELATE_BNR_MOD2=1,
 911         GEOSRELATE_BNR_OGC=1,
 912         GEOSRELATE_BNR_ENDPOINT=2,
 913         GEOSRELATE_BNR_MULTIVALENT_ENDPOINT=3,
 914         GEOSRELATE_BNR_MONOVALENT_ENDPOINT=4
 915 };
 916
 917 /* return 2 on exception, 1 on true, 0 on false */
 918 extern char GEOS_DLL GEOSRelatePattern(const GEOSGeometry* g1, const GEOSGeometry* g2, const char *pat);
 919 extern char GEOS_DLL GEOSRelatePattern_r(GEOSContextHandle_t handle,
 920                                          const GEOSGeometry* g1,
 921                                          const GEOSGeometry* g2,
 922                                          const char *pat);
 923
 924 /* return NULL on exception, a string to GEOSFree otherwise */
 925 extern char GEOS_DLL *GEOSRelate(const GEOSGeometry* g1, const GEOSGeometry* g2);
 926 extern char GEOS_DLL *GEOSRelate_r(GEOSContextHandle_t handle,
 927                                    const GEOSGeometry* g1,
 928                                    const GEOSGeometry* g2);
 929
 930 /* return 2 on exception, 1 on true, 0 on false */
 931 extern char GEOS_DLL GEOSRelatePatternMatch(const char* mat, const char *pat);
 932 extern char GEOS_DLL GEOSRelatePatternMatch_r(GEOSContextHandle_t handle,
 933                                          const char* mat,
 934                                          const char *pat);
 935
 936 /* return NULL on exception, a string to GEOSFree otherwise */
 937 extern char GEOS_DLL *GEOSRelateBoundaryNodeRule(const GEOSGeometry* g1,
 938                                                  const GEOSGeometry* g2,
 939                                                  int bnr);
 940 extern char GEOS_DLL *GEOSRelateBoundaryNodeRule_r(GEOSContextHandle_t handle,
 941                                                    const GEOSGeometry* g1,
 942                                                    const GEOSGeometry* g2,
 943                                                    int bnr);
 944
 945 /************************************************************************
 946  *
 947  *  Validity checking
 948  *
 949  ***********************************************************************/
 950
 951 /* These are for use with GEOSisValidDetail (flags param) */
 952 enum GEOSValidFlags {
 953         GEOSVALID_ALLOW_SELFTOUCHING_RING_FORMING_HOLE=1
 954 };
 955
 956 /* return 2 on exception, 1 on true, 0 on false */
 957 extern char GEOS_DLL GEOSisValid(const GEOSGeometry* g1);
 958 extern char GEOS_DLL GEOSisValid_r(GEOSContextHandle_t handle,
 959                                    const GEOSGeometry* g1);
 960
 961 /* return NULL on exception, a string to GEOSFree otherwise */
 962 extern char GEOS_DLL *GEOSisValidReason(const GEOSGeometry *g1);
 963 extern char GEOS_DLL *GEOSisValidReason_r(GEOSContextHandle_t handle,
 964                                          const GEOSGeometry* g1);
 965
 966 /*
 967  * Caller has the responsibility to destroy 'reason' (GEOSFree)
 968  * and 'location' (GEOSGeom_destroy) params
 969  * return 2 on exception, 1 when valid, 0 when invalid
 970  */
 971 extern char GEOS_DLL GEOSisValidDetail(const GEOSGeometry* g,
 972                                        int flags,
 973                                        char** reason, GEOSGeometry** location);
 974 extern char GEOS_DLL GEOSisValidDetail_r(GEOSContextHandle_t handle,
 975                                          const GEOSGeometry* g,
 976                                          int flags,
 977                                          char** reason,
 978                                          GEOSGeometry** location);
 979
 980 /************************************************************************
 981  *
 982  *  Geometry info
 983  *
 984  ***********************************************************************/
 985
 986 /* Return NULL on exception, result must be freed by caller. */
 987 extern char GEOS_DLL *GEOSGeomType(const GEOSGeometry* g1);
 988
 989 extern char GEOS_DLL *GEOSGeomType_r(GEOSContextHandle_t handle,
 990                                      const GEOSGeometry* g1);
 991
 992 /* Return -1 on exception */
 993 extern int GEOS_DLL GEOSGeomTypeId(const GEOSGeometry* g1);
 994
 995 extern int GEOS_DLL GEOSGeomTypeId_r(GEOSContextHandle_t handle,
 996                                      const GEOSGeometry* g1);
 997
 998 /* Return 0 on exception */
 999 extern int GEOS_DLL GEOSGetSRID(const GEOSGeometry* g);
1000 extern int GEOS_DLL GEOSGetSRID_r(GEOSContextHandle_t handle,
1001                                   const GEOSGeometry* g);
1002
1003 extern void GEOS_DLL GEOSSetSRID(GEOSGeometry* g, int SRID);
1004 extern void GEOS_DLL GEOSSetSRID_r(GEOSContextHandle_t handle,
1005                                    GEOSGeometry* g, int SRID);
1006
1007 /* May be called on all geometries in GEOS 3.x, returns -1 on error and 1
1008  * for non-multi geometries. Older GEOS versions only accept
1009  * GeometryCollections or Multi* geometries here, and are likely to crash
1010  * when feeded simple geometries, so beware if you need compatibility with
1011  * old GEOS versions.
1012  */
1013 extern int GEOS_DLL GEOSGetNumGeometries(const GEOSGeometry* g);
1014
1015 extern int GEOS_DLL GEOSGetNumGeometries_r(GEOSContextHandle_t handle,
1016                                            const GEOSGeometry* g);
1017
1018 /*
1019  * Return NULL on exception.
1020  * Returned object is a pointer to internal storage:
1021  * it must NOT be destroyed directly.
1022  * Up to GEOS 3.2.0 the input geometry must be a Collection, in
1023  * later version it doesn't matter (getGeometryN(0) for a single will
1024  * return the input).
1025  */
1026 extern const GEOSGeometry GEOS_DLL *GEOSGetGeometryN(const GEOSGeometry* g, int n);
1027
1028 extern const GEOSGeometry GEOS_DLL *GEOSGetGeometryN_r(
1029                                     GEOSContextHandle_t handle,
1030                                     const GEOSGeometry* g, int n);
1031
1032 /* Return -1 on exception */
1033 extern int GEOS_DLL GEOSNormalize(GEOSGeometry* g1);
1034
1035 extern int GEOS_DLL GEOSNormalize_r(GEOSContextHandle_t handle,
1036                                     GEOSGeometry* g1);
1037
1038 /* Return -1 on exception */
1039 extern int GEOS_DLL GEOSGetNumInteriorRings(const GEOSGeometry* g1);
1040
1041 extern int GEOS_DLL GEOSGetNumInteriorRings_r(GEOSContextHandle_t handle,
1042                                               const GEOSGeometry* g1);
1043
1044 /* Return -1 on exception, Geometry must be a LineString. */
1045 extern int GEOS_DLL GEOSGeomGetNumPoints(const GEOSGeometry* g1);
1046
1047 extern int GEOS_DLL GEOSGeomGetNumPoints_r(GEOSContextHandle_t handle,
1048                                        const GEOSGeometry* g1);
1049
1050 /* Return -1 on exception, Geometry must be a Point. */
1051 extern int GEOS_DLL GEOSGeomGetX(const GEOSGeometry *g1, double *x);
1052 extern int GEOS_DLL GEOSGeomGetY(const GEOSGeometry *g1, double *y);
1053
1054 extern int GEOS_DLL GEOSGeomGetX_r(GEOSContextHandle_t handle, const GEOSGeometry *g1, double *x);
1055 extern int GEOS_DLL GEOSGeomGetY_r(GEOSContextHandle_t handle, const GEOSGeometry *g1, double *y);
1056
1057 /*
1058  * Return NULL on exception, Geometry must be a Polygon.
1059  * Returned object is a pointer to internal storage:
1060  * it must NOT be destroyed directly.
1061  */
1062 extern const GEOSGeometry GEOS_DLL *GEOSGetInteriorRingN(const GEOSGeometry* g, int n);
1063
1064 extern const GEOSGeometry GEOS_DLL *GEOSGetInteriorRingN_r(
1065                                     GEOSContextHandle_t handle,
1066                                     const GEOSGeometry* g, int n);
1067
1068 /*
1069  * Return NULL on exception, Geometry must be a Polygon.
1070  * Returned object is a pointer to internal storage:
1071  * it must NOT be destroyed directly.
1072  */
1073 extern const GEOSGeometry GEOS_DLL *GEOSGetExteriorRing(const GEOSGeometry* g);
1074
1075 extern const GEOSGeometry GEOS_DLL *GEOSGetExteriorRing_r(
1076                                     GEOSContextHandle_t handle,
1077                                     const GEOSGeometry* g);
1078
1079 /* Return -1 on exception */
1080 extern int GEOS_DLL GEOSGetNumCoordinates(const GEOSGeometry* g1);
1081
1082 extern int GEOS_DLL GEOSGetNumCoordinates_r(GEOSContextHandle_t handle,
1083                                             const GEOSGeometry* g1);
1084
1085 /*
1086  * Return NULL on exception.
1087  * Geometry must be a LineString, LinearRing or Point.
1088  */
1089 extern const GEOSCoordSequence GEOS_DLL *GEOSGeom_getCoordSeq(const GEOSGeometry* g);
1090
1091 extern const GEOSCoordSequence GEOS_DLL *GEOSGeom_getCoordSeq_r(
1092                                          GEOSContextHandle_t handle,
1093                                          const GEOSGeometry* g);
1094
1095 /*
1096  * Return 0 on exception (or empty geometry)
1097  */
1098 extern int GEOS_DLL GEOSGeom_getDimensions(const GEOSGeometry* g);
1099
1100 extern int GEOS_DLL GEOSGeom_getDimensions_r(GEOSContextHandle_t handle,
1101                                              const GEOSGeometry* g);
1102
1103 /*
1104  * Return 2 or 3.
1105  */
1106 extern int GEOS_DLL GEOSGeom_getCoordinateDimension(const GEOSGeometry* g);
1107
1108 extern int GEOS_DLL GEOSGeom_getCoordinateDimension_r(GEOSContextHandle_t handle,
1109                                                       const GEOSGeometry* g);
1110
1111 /*
1112  * Return NULL on exception.
1113  * Must be LineString and must be freed by called.
1114  */
1115 extern GEOSGeometry GEOS_DLL *GEOSGeomGetPointN(const GEOSGeometry *g1, int n);
1116 extern GEOSGeometry GEOS_DLL *GEOSGeomGetStartPoint(const GEOSGeometry *g1);
1117 extern GEOSGeometry GEOS_DLL *GEOSGeomGetEndPoint(const GEOSGeometry *g1);
1118
1119 extern GEOSGeometry GEOS_DLL *GEOSGeomGetPointN_r(GEOSContextHandle_t handle, const GEOSGeometry *g1, int n);
1120 extern GEOSGeometry GEOS_DLL *GEOSGeomGetStartPoint_r(GEOSContextHandle_t handle, const GEOSGeometry *g1);
1121 extern GEOSGeometry GEOS_DLL *GEOSGeomGetEndPoint_r(GEOSContextHandle_t handle, const GEOSGeometry *g1);
1122
1123 /************************************************************************
1124  *
1125  *  Misc functions
1126  *
1127  ***********************************************************************/
1128
1129 /* Return 0 on exception, 1 otherwise */
1130 extern int GEOS_DLL GEOSArea(const GEOSGeometry* g1, double *area);
1131 extern int GEOS_DLL GEOSLength(const GEOSGeometry* g1, double *length);
1132 extern int GEOS_DLL GEOSDistance(const GEOSGeometry* g1, const GEOSGeometry* g2,
1133         double *dist);
1134 extern int GEOS_DLL GEOSHausdorffDistance(const GEOSGeometry *g1,
1135         const GEOSGeometry *g2, double *dist);
1136 extern int GEOS_DLL GEOSHausdorffDistanceDensify(const GEOSGeometry *g1,
1137         const GEOSGeometry *g2, double densifyFrac, double *dist);
1138 extern int GEOS_DLL GEOSGeomGetLength(const GEOSGeometry *g1, double *length);
1139 extern int GEOS_DLL GEOSArea_r(GEOSContextHandle_t handle,
1140                                const GEOSGeometry* g1, double *area);
1141 extern int GEOS_DLL GEOSLength_r(GEOSContextHandle_t handle,
1142                                  const GEOSGeometry* g1, double *length);
1143 extern int GEOS_DLL GEOSDistance_r(GEOSContextHandle_t handle,
1144                                    const GEOSGeometry* g1,
1145                                    const GEOSGeometry* g2, double *dist);
1146 extern int GEOS_DLL GEOSHausdorffDistance_r(GEOSContextHandle_t handle,
1147                                    const GEOSGeometry *g1,
1148                                    const GEOSGeometry *g2,
1149                                    double *dist);
1150 extern int GEOS_DLL GEOSHausdorffDistanceDensify_r(GEOSContextHandle_t handle,
1151                                    const GEOSGeometry *g1,
1152                                    const GEOSGeometry *g2,
1153                                    double densifyFrac, double *dist);
1154 extern int GEOS_DLL GEOSGeomGetLength_r(GEOSContextHandle_t handle,
1155                                    const GEOSGeometry *g1, double *length);
1156
1157 /************************************************************************
1158  *
1159  * Algorithms
1160  *
1161  ***********************************************************************/
1162
1163 /* Walking from A to B:
1164  *  return -1 if reaching P takes a counter-clockwise (left) turn
1165  *  return  1 if reaching P takes a clockwise (right) turn
1166  *  return  0 if P is collinear with A-B
1167  *
1168  * On exceptions, return 2.
1169  *
1170  */
1171 extern int GEOS_DLL GEOSOrientationIndex(double Ax, double Ay, double Bx, double By,
1172         double Px, double Py);
1173 extern int GEOS_DLL GEOSOrientationIndex_r(GEOSContextHandle_t handle,
1174         double Ax, double Ay, double Bx, double By, double Px, double Py);
1175
1176
1177 /************************************************************************
1178  *
1179  * Reader and Writer APIs
1180  *
1181  ***********************************************************************/
1182
1183 typedef struct GEOSWKTReader_t GEOSWKTReader;
1184 typedef struct GEOSWKTWriter_t GEOSWKTWriter;
1185 typedef struct GEOSWKBReader_t GEOSWKBReader;
1186 typedef struct GEOSWKBWriter_t GEOSWKBWriter;
1187
1188
1189 /* WKT Reader */
1190 extern GEOSWKTReader GEOS_DLL *GEOSWKTReader_create();
1191 extern void GEOS_DLL GEOSWKTReader_destroy(GEOSWKTReader* reader);
1192 extern GEOSGeometry GEOS_DLL *GEOSWKTReader_read(GEOSWKTReader* reader, const char *wkt);
1193
1194 extern GEOSWKTReader GEOS_DLL *GEOSWKTReader_create_r(
1195                                              GEOSContextHandle_t handle);
1196 extern void GEOS_DLL GEOSWKTReader_destroy_r(GEOSContextHandle_t handle,
1197                                              GEOSWKTReader* reader);
1198 extern GEOSGeometry GEOS_DLL *GEOSWKTReader_read_r(GEOSContextHandle_t handle,
1199                                                    GEOSWKTReader* reader,
1200                                                    const char *wkt);
1201
1202 /* WKT Writer */
1203 extern GEOSWKTWriter GEOS_DLL *GEOSWKTWriter_create();
1204 extern void GEOS_DLL GEOSWKTWriter_destroy(GEOSWKTWriter* writer);
1205 extern char GEOS_DLL *GEOSWKTWriter_write(GEOSWKTWriter* reader, const GEOSGeometry* g);
1206 extern void GEOS_DLL GEOSWKTWriter_setTrim(GEOSWKTWriter *writer, char trim);
1207 extern void GEOS_DLL GEOSWKTWriter_setRoundingPrecision(GEOSWKTWriter *writer, int precision);
1208 extern void GEOS_DLL GEOSWKTWriter_setOutputDimension(GEOSWKTWriter *writer, int dim);
1209 extern int  GEOS_DLL GEOSWKTWriter_getOutputDimension(GEOSWKTWriter *writer);
1210 extern void GEOS_DLL GEOSWKTWriter_setOld3D(GEOSWKTWriter *writer, int useOld3D);
1211
1212 extern GEOSWKTWriter GEOS_DLL *GEOSWKTWriter_create_r(
1213                                              GEOSContextHandle_t handle);
1214 extern void GEOS_DLL GEOSWKTWriter_destroy_r(GEOSContextHandle_t handle,
1215                                              GEOSWKTWriter* writer);
1216 extern char GEOS_DLL *GEOSWKTWriter_write_r(GEOSContextHandle_t handle,
1217                                             GEOSWKTWriter* reader,
1218                                             const GEOSGeometry* g);
1219 extern void GEOS_DLL GEOSWKTWriter_setTrim_r(GEOSContextHandle_t handle,
1220                                             GEOSWKTWriter *writer,
1221                                             char trim);
1222 extern void GEOS_DLL GEOSWKTWriter_setRoundingPrecision_r(GEOSContextHandle_t handle,
1223                                             GEOSWKTWriter *writer,
1224                                             int precision);
1225 extern void GEOS_DLL GEOSWKTWriter_setOutputDimension_r(GEOSContextHandle_t handle,
1226                                                         GEOSWKTWriter *writer,
1227                                                         int dim);
1228 extern int  GEOS_DLL GEOSWKTWriter_getOutputDimension_r(GEOSContextHandle_t handle,
1229                                                         GEOSWKTWriter *writer);
1230 extern void GEOS_DLL GEOSWKTWriter_setOld3D_r(GEOSContextHandle_t handle,
1231                                               GEOSWKTWriter *writer,
1232                                               int useOld3D);
1233
1234 /* WKB Reader */
1235 extern GEOSWKBReader GEOS_DLL *GEOSWKBReader_create();
1236 extern void GEOS_DLL GEOSWKBReader_destroy(GEOSWKBReader* reader);
1237 extern GEOSGeometry GEOS_DLL *GEOSWKBReader_read(GEOSWKBReader* reader, const unsigned char *wkb, size_t size);
1238 extern GEOSGeometry GEOS_DLL *GEOSWKBReader_readHEX(GEOSWKBReader* reader, const unsigned char *hex, size_t size);
1239
1240 extern GEOSWKBReader GEOS_DLL *GEOSWKBReader_create_r(
1241                                              GEOSContextHandle_t handle);
1242 extern void GEOS_DLL GEOSWKBReader_destroy_r(GEOSContextHandle_t handle,
1243                                              GEOSWKBReader* reader);
1244 extern GEOSGeometry GEOS_DLL *GEOSWKBReader_read_r(GEOSContextHandle_t handle,
1245                                                    GEOSWKBReader* reader,
1246                                                    const unsigned char *wkb,
1247                                                    size_t size);
1248 extern GEOSGeometry GEOS_DLL *GEOSWKBReader_readHEX_r(
1249                                             GEOSContextHandle_t handle,
1250                                             GEOSWKBReader* reader,
1251                                             const unsigned char *hex,
1252                                             size_t size);
1253
1254 /* WKB Writer */
1255 extern GEOSWKBWriter GEOS_DLL *GEOSWKBWriter_create();
1256 extern void GEOS_DLL GEOSWKBWriter_destroy(GEOSWKBWriter* writer);
1257
1258 extern GEOSWKBWriter GEOS_DLL *GEOSWKBWriter_create_r(
1259                                              GEOSContextHandle_t handle);
1260 extern void GEOS_DLL GEOSWKBWriter_destroy_r(GEOSContextHandle_t handle,
1261                                              GEOSWKBWriter* writer);
1262
1263 /* The caller owns the results for these two methods! */
1264 extern unsigned char GEOS_DLL *GEOSWKBWriter_write(GEOSWKBWriter* writer, const GEOSGeometry* g, size_t *size);
1265 extern unsigned char GEOS_DLL *GEOSWKBWriter_writeHEX(GEOSWKBWriter* writer, const GEOSGeometry* g, size_t *size);
1266
1267 extern unsigned char GEOS_DLL *GEOSWKBWriter_write_r(
1268                                              GEOSContextHandle_t handle,
1269                                              GEOSWKBWriter* writer,
1270                                              const GEOSGeometry* g,
1271                                              size_t *size);
1272 extern unsigned char GEOS_DLL *GEOSWKBWriter_writeHEX_r(
1273                                              GEOSContextHandle_t handle,
1274                                              GEOSWKBWriter* writer,
1275                                              const GEOSGeometry* g,
1276                                              size_t *size);
1277
1278 /*
1279  * Specify whether output WKB should be 2d or 3d.
1280  * Return previously set number of dimensions.
1281  */
1282 extern int GEOS_DLL GEOSWKBWriter_getOutputDimension(const GEOSWKBWriter* writer);
1283 extern void GEOS_DLL GEOSWKBWriter_setOutputDimension(GEOSWKBWriter* writer, int newDimension);
1284
1285 extern int GEOS_DLL GEOSWKBWriter_getOutputDimension_r(
1286                                   GEOSContextHandle_t handle,
1287                                   const GEOSWKBWriter* writer);
1288 extern void GEOS_DLL GEOSWKBWriter_setOutputDimension_r(
1289                                    GEOSContextHandle_t handle,
1290                                    GEOSWKBWriter* writer, int newDimension);
1291
1292 /*
1293  * Specify whether the WKB byte order is big or little endian.
1294  * The return value is the previous byte order.
1295  */
1296 extern int GEOS_DLL GEOSWKBWriter_getByteOrder(const GEOSWKBWriter* writer);
1297 extern void GEOS_DLL GEOSWKBWriter_setByteOrder(GEOSWKBWriter* writer, int byteOrder);
1298
1299 extern int GEOS_DLL GEOSWKBWriter_getByteOrder_r(GEOSContextHandle_t handle,
1300                                                  const GEOSWKBWriter* writer);
1301 extern void GEOS_DLL GEOSWKBWriter_setByteOrder_r(GEOSContextHandle_t handle,
1302                                                   GEOSWKBWriter* writer,
1303                                                   int byteOrder);
1304
1305 /*
1306  * Specify whether SRID values should be output.
1307  */
1308 extern char GEOS_DLL GEOSWKBWriter_getIncludeSRID(const GEOSWKBWriter* writer);
1309 extern void GEOS_DLL GEOSWKBWriter_setIncludeSRID(GEOSWKBWriter* writer, const char writeSRID);
1310
1311 extern char GEOS_DLL GEOSWKBWriter_getIncludeSRID_r(GEOSContextHandle_t handle,
1312                                    const GEOSWKBWriter* writer);
1313 extern void GEOS_DLL GEOSWKBWriter_setIncludeSRID_r(GEOSContextHandle_t handle,
1314                                    GEOSWKBWriter* writer, const char writeSRID);
1315
1316
1317 /*
1318  * Free buffers returned by stuff like GEOSWKBWriter_write(),
1319  * GEOSWKBWriter_writeHEX() and GEOSWKTWriter_write().
1320  */
1321 extern void GEOS_DLL GEOSFree( void *buffer );
1322 extern void GEOS_DLL GEOSFree_r( GEOSContextHandle_t handle, void *buffer );
1323
1324 #ifdef __cplusplus
1325 } // extern "C"
1326 #endif
1327
1328 #endif /* #ifndef GEOS_C_H_INCLUDED */