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postgis/liblwgeom/liblwgeom.h
Paul Ramsey 34f03aa8cd Start the geodetic machinery. Add an internal API header for eventual API rationalisation 
git-svn-id: http://svn.osgeo.org/postgis/trunk@4498 b70326c6-7e19-0410-871a-916f4a2858ee
2009-09-14 20:30:35 +00:00

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/**********************************************************************
* $Id$
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.refractions.net
* Copyright 2001-2006 Refractions Research Inc.
* Copyright 2007-2008 Mark Cave-Ayland
* Copyright 2008 Paul Ramsey <pramsey@cleverelephant.ca>
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU General Public Licence. See the COPYING file.
*
**********************************************************************/
#ifndef _LIBLWGEOM_H
#define _LIBLWGEOM_H 1
#include "../postgis_config.h"
#include <stdarg.h>
#include <stdio.h>
/**
* @file liblwgeom.h
*
* This library is the generic geometry handling section of PostGIS. The geometry
* objects, constructors, destructors, and a set of spatial processing functions,
* are implemented here.
*
* The library is designed for use in non-PostGIS applications if necessary. The
* units tests at cunit/cu_tester.c and the loader/dumper programs at
* ../loader/shp2pgsql.c are examples of non-PostGIS applications using liblwgeom.
*
* Programs using this library should set up the default memory managers and error
* handlers by implementing an lwgeom_init_allocators() function, which can be as
* a wrapper around the lwgeom_install_default_allocators() function if you want
* no special handling for memory management and error reporting.
*/
#define INTEGRITY_CHECKS 1
/*
** Floating point comparitors.
*/
#define FP_TOLERANCE 1e-12
#define FP_IS_ZERO(A) (fabs(A) <= FP_TOLERANCE)
#define FP_MAX(A, B) (((A) > (B)) ? (A) : (B))
#define FP_MIN(A, B) (((A) < (B)) ? (A) : (B))
#define FP_EQUALS(A, B) (fabs((A)-(B)) <= FP_TOLERANCE)
#define FP_NEQUALS(A, B) (fabs((A)-(B)) > FP_TOLERANCE)
#define FP_LT(A, B) (((A) + FP_TOLERANCE) < (B))
#define FP_LTEQ(A, B) (((A) - FP_TOLERANCE) <= (B))
#define FP_GT(A, B) (((A) - FP_TOLERANCE) > (B))
#define FP_GTEQ(A, B) (((A) + FP_TOLERANCE) >= (B))
#define FP_CONTAINS_TOP(A, X, B) (FP_LT(A, X) && FP_LTEQ(X, B))
#define FP_CONTAINS_BOTTOM(A, X, B) (FP_LTEQ(A, X) && FP_LT(X, B))
#define FP_CONTAINS_INCL(A, X, B) (FP_LTEQ(A, X) && FP_LTEQ(X, B))
#define FP_CONTAINS_EXCL(A, X, B) (FP_LT(A, X) && FP_LT(X, B))
#define FP_CONTAINS(A, X, B) FP_CONTAINS_EXCL(A, X, B)
/*
** Utility true and false defines.
*/
#define LW_TRUE 1
#define LW_FALSE 0
/*
* this will change to NaN when I figure out how to
* get NaN in a platform-independent way
*/
#define NO_VALUE 0.0
#define NO_Z_VALUE NO_VALUE
#define NO_M_VALUE NO_VALUE
#ifndef MAXFLOAT
#define MAXFLOAT 3.402823466e+38F
#endif
#ifndef C_H
typedef unsigned int uint32;
typedef int int32;
#endif
/**
* Global functions for memory/logging handlers.
*/
typedef void* (*lwallocator)(size_t size);
typedef void* (*lwreallocator)(void *mem, size_t size);
typedef void (*lwfreeor)(void* mem);
typedef void (*lwreporter)(const char* fmt, va_list ap);
extern lwreallocator lwrealloc_var;
extern lwallocator lwalloc_var;
extern lwfreeor lwfree_var;
extern lwreporter lwerror_var;
extern lwreporter lwnotice_var;
/**
* Supply the memory management and error handling functions you want your
* application to use.
* @ingroup system
*/
extern void lwgeom_init_allocators(void);
/**
* Apply the default memory management (malloc() and free()) and error handlers.
* Called inside lwgeom_init_allocators() generally.
* @ingroup system
*/
extern void lwgeom_install_default_allocators(void);
/**
* Write a notice out to the notice handler. Uses standard printf() substitutions.
* Use for messages you always want output. For debugging, use LWDEBUG() or LWDEBUGF().
* @ingroup logging
*/
void lwnotice(const char *fmt, ...);
/**
* Write a notice out to the error handler. Uses standard printf() substitutions.
* Use for errors you always want output. For debugging, use LWDEBUG() or LWDEBUGF().
* @ingroup logging
*/
void lwerror(const char *fmt, ...);
/**
* The default memory/logging handlers installed by lwgeom_install_default_allocators()
*/
void *default_allocator(size_t size);
void *default_reallocator(void *mem, size_t size);
void default_freeor(void *ptr);
void default_errorreporter(const char *fmt, va_list ap);
void default_noticereporter(const char *fmt, va_list ap);
extern int lw_vasprintf (char **result, const char *format, va_list args);
extern int lw_asprintf
#if __STDC__
(char **result, const char *format, ...);
#else
(result, va_alist);
char **result;
va_dcl
#endif
/* Debug macros */
#if POSTGIS_DEBUG_LEVEL > 0
/* Display a notice at the given debug level */
#define LWDEBUG(level, msg) \
do { \
if (POSTGIS_DEBUG_LEVEL >= level) \
lwnotice("[%s:%s:%d] " msg, __FILE__, __func__, __LINE__); \
} while (0);
/* Display a formatted notice at the given debug level (like printf, with variadic arguments) */
#define LWDEBUGF(level, msg, ...) \
do { \
if (POSTGIS_DEBUG_LEVEL >= level) \
lwnotice("[%s:%s:%d] " msg, __FILE__, __func__, __LINE__, __VA_ARGS__); \
} while (0);
#else
/* Empty prototype that can be optimised away by the compiler for non-debug builds */
#define LWDEBUG(level, msg) \
((void) 0)
/* Empty prototype that can be optimised away by the compiler for non-debug builds */
#define LWDEBUGF(level, msg, ...) \
((void) 0)
#endif
/******************************************************************/
typedef unsigned char uchar;
typedef struct
{
float xmin;
float ymin;
float xmax;
float ymax;
}
BOX2DFLOAT4;
typedef struct
{
double xmin, ymin, zmin;
double xmax, ymax, zmax;
}
BOX3D;
typedef struct chiptag
{
int size; /* unused (for use by postgresql) */
int endian_hint; /* the number 1 in the endian of this datastruct */
BOX3D bvol;
int SRID;
char future[4];
float factor; /* Usually 1.0.
* Integer values are multiplied by this number
* to get the actual height value
* (for sub-meter accuracy height data).
*/
int datatype; /* 1 = float32,
* 5 = 24bit integer,
* 6 = 16bit integer (short)
* 7 = 16bit ???
* 8 = 8bit ???
* 101 = float32 (NDR),
* 105 = 24bit integer (NDR),
* 106 = 16bit int (NDR)
* 107 = 16bit ??? (NDR)
* 108 = 8bit ??? (NDR) (this doesn't make sense)
*/
int height;
int width;
int compression; /* 0 = no compression, 1 = differencer
* 0x80 = new value
* 0x7F = nodata
*/
/*
* this is provided for convenience, it should be set to
* sizeof(chip) bytes into the struct because the serialized form is:
* <header><data>
* NULL when serialized
*/
void *data; /* data[0] = bottm left,
* data[width] = 1st pixel, 2nd row (uncompressed)
*/
}
CHIP;
/*
* standard definition of an ellipsoid (what wkt calls a spheroid)
* f = (a-b)/a
* e_sq = (a*a - b*b)/(a*a)
* b = a - fa
*/
typedef struct
{
double a; /* semimajor axis */
double b; /* semiminor axis */
double f; /* flattening */
double e; /* eccentricity (first) */
double e_sq; /* eccentricity (first), squared */
char name[20]; /* name of ellipse */
}
SPHEROID;
/*
* ALL LWGEOM structures will use POINT3D as an abstract point.
* This means a 2d geometry will be stored as (x,y) in its serialized
* form, but all functions will work on (x,y,0). This keeps all the
* analysis functions simple.
* NOTE: for GEOS integration, we'll probably set z=NaN
* so look out - z might be NaN for 2d geometries!
*/
typedef struct
{
double x,y,z;
}
POINT3DZ;
typedef struct
{
double x,y,z;
}
POINT3D; /* alias for POINT3DZ */
typedef struct
{
double x,y,m;
}
POINT3DM;
/*
* type for 2d points. When you convert this to 3d, the
* z component will be either 0 or NaN.
*/
typedef struct
{
double x;
double y;
}
POINT2D;
typedef struct
{
double x;
double y;
double z;
double m;
}
POINT4D;
/******************************************************************/
/*
* Point array abstracts a lot of the complexity of points and point lists.
* It handles miss-alignment in the serialized form, 2d/3d translation
* (2d points converted to 3d will have z=0 or NaN)
* DONT MIX 2D and 3D POINTS! *EVERYTHING* is either one or the other
*/
typedef struct
{
/* array of POINT 2D, 3D or 4D. probably missaligned. */
uchar *serialized_pointlist;
/* use TYPE_* macros to handle */
uchar dims;
uint32 npoints;
}
POINTARRAY;
/*
* Use the following to build pointarrays
* when number of points in output is not
* known in advance
*/
typedef struct
{
POINTARRAY *pa;
size_t ptsize;
size_t capacity; /* given in points */
}
DYNPTARRAY;
/* Create a new dynamic pointarray */
extern DYNPTARRAY *dynptarray_create(size_t initial_capacity, int dims);
/*
* Add a POINT4D to the dynamic pointarray.
*
* The dynamic pointarray may be of any dimension, only
* accepted dimensions will be copied.
*
* If allow_duplicates is set to 0 (false) a check
* is performed to see if last point in array is equal to the
* provided one. NOTE that the check is 4d based, with missing
* ordinates in the pointarray set to NO_Z_VALUE and NO_M_VALUE
* respectively.
*/
extern int dynptarray_addPoint4d(DYNPTARRAY *dpa, POINT4D *p4d,
int allow_duplicates);
/******************************************************************
*
* LWGEOM (any type)
*
******************************************************************/
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID; /* -1 == unneeded */
void *data;
}
LWGEOM;
/* POINTYPE */
typedef struct
{
uchar type; /* POINTTYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
POINTARRAY *point; /* hide 2d/3d (this will be an array of 1 point) */
}
LWPOINT; /* "light-weight point" */
/* LINETYPE */
typedef struct
{
uchar type; /* LINETYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
POINTARRAY *points; /* array of POINT3D */
}
LWLINE; /* "light-weight line" */
/* POLYGONTYPE */
typedef struct
{
uchar type; /* POLYGONTYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
int nrings;
POINTARRAY **rings; /* list of rings (list of points) */
}
LWPOLY; /* "light-weight polygon" */
/* MULTIPOINTTYPE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWPOINT **geoms;
}
LWMPOINT;
/* MULTILINETYPE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWLINE **geoms;
}
LWMLINE;
/* MULTIPOLYGONTYPE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWPOLY **geoms;
}
LWMPOLY;
/* COLLECTIONTYPE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWGEOM **geoms;
}
LWCOLLECTION;
/* CIRCSTRINGTYPE */
typedef struct
{
uchar type; /* CIRCSTRINGTYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
POINTARRAY *points; /* array of POINT(3D/3DM) */
}
LWCIRCSTRING; /* "light-weight circularstring" */
/* COMPOUNDTYPE */
typedef struct
{
uchar type; /* COMPOUNDTYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWGEOM **geoms;
}
LWCOMPOUND; /* "light-weight compound line" */
/* CURVEPOLYTYPE */
typedef struct
{
uchar type; /* CURVEPOLYTYPE */
BOX2DFLOAT4 *bbox;
uint32 SRID;
int nrings;
LWGEOM **rings; /* list of rings (list of points) */
}
LWCURVEPOLY; /* "light-weight polygon" */
/* MULTICURVE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWGEOM **geoms;
}
LWMCURVE;
/* MULTISURFACETYPE */
typedef struct
{
uchar type;
BOX2DFLOAT4 *bbox;
uint32 SRID;
int ngeoms;
LWGEOM **geoms;
}
LWMSURFACE;
/* Casts LWGEOM->LW* (return NULL if cast is illegal) */
extern LWMPOLY *lwgeom_as_lwmpoly(LWGEOM *lwgeom);
extern LWMLINE *lwgeom_as_lwmline(LWGEOM *lwgeom);
extern LWMPOINT *lwgeom_as_lwmpoint(LWGEOM *lwgeom);
extern LWCOLLECTION *lwgeom_as_lwcollection(LWGEOM *lwgeom);
extern LWPOLY *lwgeom_as_lwpoly(LWGEOM *lwgeom);
extern LWLINE *lwgeom_as_lwline(LWGEOM *lwgeom);
extern LWPOINT *lwgeom_as_lwpoint(LWGEOM *lwgeom);
extern LWCIRCSTRING *lwgeom_as_lwcircstring(LWGEOM *lwgeom);
extern LWGEOM *lwgeom_as_multi(LWGEOM *lwgeom);
/* Casts LW*->LWGEOM (always cast) */
extern LWGEOM *lwmpoly_as_lwgeom(LWMPOLY *obj);
extern LWGEOM *lwmline_as_lwgeom(LWMLINE *obj);
extern LWGEOM *lwmpoint_as_lwgeom(LWMPOINT *obj);
extern LWGEOM *lwcollection_as_lwgeom(LWCOLLECTION *obj);
extern LWGEOM *lwcircstring_as_lwgeom(LWCIRCSTRING *obj);
extern LWGEOM *lwpoly_as_lwgeom(LWPOLY *obj);
extern LWGEOM *lwline_as_lwgeom(LWLINE *obj);
extern LWGEOM *lwpoint_as_lwgeom(LWPOINT *obj);
/*
* Call this function everytime LWGEOM coordinates
* change so to invalidate bounding box
*/
extern void lwgeom_changed(LWGEOM *lwgeom);
/*
* Call this function to drop BBOX and SRID
* from LWGEOM. If LWGEOM type is *not* flagged
* with the HASBBOX flag and has a bbox, it
* will be released.
*/
extern void lwgeom_drop_bbox(LWGEOM *lwgeom);
/* Compute a bbox if not already computed */
extern void lwgeom_add_bbox(LWGEOM *lwgeom);
extern void lwgeom_dropSRID(LWGEOM *lwgeom);
/* Determine whether a LWGEOM can contain sub-geometries or not */
extern int lwgeom_contains_subgeoms(int type);
/******************************************************************/
/*
* copies a point from the point array into the parameter point
* will set point's z=0 (or NaN) if pa is 2d
* will set point's m=0 (or NaN) if pa is 3d or 2d
* NOTE: point is a real POINT3D *not* a pointer
*/
extern POINT4D getPoint4d(const POINTARRAY *pa, int n);
/*
* copies a point from the point array into the parameter point
* will set point's z=0 (or NaN) if pa is 2d
* will set point's m=0 (or NaN) if pa is 3d or 2d
* NOTE: this will modify the point4d pointed to by 'point'.
*/
extern int getPoint4d_p(const POINTARRAY *pa, int n, POINT4D *point);
/*
* copies a point from the point array into the parameter point
* will set point's z=0 (or NaN) if pa is 2d
* NOTE: point is a real POINT3D *not* a pointer
*/
extern POINT3DZ getPoint3dz(const POINTARRAY *pa, int n);
extern POINT3DM getPoint3dm(const POINTARRAY *pa, int n);
/*
* copies a point from the point array into the parameter point
* will set point's z=0 (or NaN) if pa is 2d
* NOTE: this will modify the point3d pointed to by 'point'.
*/
extern int getPoint3dz_p(const POINTARRAY *pa, int n, POINT3DZ *point);
extern int getPoint3dm_p(const POINTARRAY *pa, int n, POINT3DM *point);
/*
* copies a point from the point array into the parameter point
* z value (if present is not returned)
* NOTE: point is a real POINT3D *not* a pointer
*/
extern POINT2D getPoint2d(const POINTARRAY *pa, int n);
/*
* copies a point from the point array into the parameter point
* z value (if present is not returned)
* NOTE: this will modify the point2d pointed to by 'point'.
*/
extern int getPoint2d_p(const POINTARRAY *pa, int n, POINT2D *point);
/*
* set point N to the given value
* NOTE that the pointarray can be of any
* dimension, the appropriate ordinate values
* will be extracted from it
*
*/
extern void setPoint4d(POINTARRAY *pa, int n, POINT4D *p4d);
/*
* get a pointer to nth point of a POINTARRAY
* You'll need to cast it to appropriate dimensioned point.
* Note that if you cast to a higher dimensional point you'll
* possibly corrupt the POINTARRAY.
*
* WARNING: Don't cast this to a POINT !
* it would not be reliable due to memory alignment constraints
*/
extern uchar *getPoint_internal(const POINTARRAY *pa, int n);
/* --- here is a macro equivalent, for speed... */
/* #define getPoint(x,n) &( (x)->serialized_pointlist[((x)->ndims*8)*(n)] ) */
/*
* constructs a POINTARRAY.
* NOTE: points is *not* copied, so be careful about modification
* (can be aligned/missaligned)
* NOTE: hasz and hasm are descriptive - it describes what type of data
* 'points' points to. No data conversion is done.
*/
extern POINTARRAY *pointArray_construct(uchar *points, char hasz, char hasm,
uint32 npoints);
/*
* Calculate the (BOX3D) bounding box of a set of points.
* Returns an alloced BOX3D or NULL (for empty geom) in the first form.
* Write result in user-provided BOX3D in second form (return 0 if untouched).
* If pa is 2d, then box3d's zmin/zmax will be set to NO_Z_VALUE
*/
extern BOX3D *ptarray_compute_box3d(const POINTARRAY *pa);
extern int ptarray_compute_box3d_p(const POINTARRAY *pa, BOX3D *out);
/*
* size of point represeneted in the POINTARRAY
* 16 for 2d, 24 for 3d, 32 for 4d
*/
extern int pointArray_ptsize(const POINTARRAY *pa);
#define POINTTYPE 1
#define LINETYPE 2
#define POLYGONTYPE 3
#define MULTIPOINTTYPE 4
#define MULTILINETYPE 5
#define MULTIPOLYGONTYPE 6
#define COLLECTIONTYPE 7
#define CIRCSTRINGTYPE 8
#define COMPOUNDTYPE 9
#define CURVEPOLYTYPE 13
#define MULTICURVETYPE 14
#define MULTISURFACETYPE 15
#define WKBZOFFSET 0x80000000
#define WKBMOFFSET 0x40000000
#define WKBSRIDFLAG 0x20000000
#define WKBBBOXFLAG 0x10000000
/* These macros work on PG_LWGEOM.type, LWGEOM.type and all its subclasses */
#define TYPE_SETTYPE(c,t) ((c)=(((c)&0xF0)|(t)))
#define TYPE_SETZM(t,z,m) ((t)=(((t)&0xCF)|((z)<<5)|((m)<<4)))
#define TYPE_SETHASBBOX(t,b) ((t)=(((t)&0x7F)|((b)<<7)))
#define TYPE_SETHASSRID(t,s) ((t)=(((t)&0xBF)|((s)<<6)))
#define TYPE_HASZ(t) ( ((t)&0x20)>>5 )
#define TYPE_HASM(t) ( ((t)&0x10)>>4 )
#define TYPE_HASBBOX(t) ( ((t)&0x80)>>7 )
#define TYPE_HASSRID(t) ( (((t)&0x40))>>6 )
#define TYPE_NDIMS(t) ((((t)&0x20)>>5)+(((t)&0x10)>>4)+2)
#define TYPE_GETTYPE(t) ((t)&0x0F)
/* 0x02==Z 0x01==M */
#define TYPE_GETZM(t) (((t)&0x30)>>4)
extern char lwgeom_hasBBOX(uchar type); /* true iff B bit set */
extern int lwgeom_ndims(uchar type); /* returns 2,3 or 4 */
extern int lwgeom_hasZ(uchar type); /* has Z ? */
extern int lwgeom_hasM(uchar type); /* has M ? */
extern int lwgeom_getType(uchar type); /* returns the tttt value */
extern uchar lwgeom_makeType(char hasZ, char hasM, char hasSRID, int type);
extern uchar lwgeom_makeType_full(char hasZ, char hasM, char hasSRID, int type, char hasBBOX);
extern char lwgeom_hasSRID(uchar type); /* true iff S bit is set */
extern char lwgeom_hasBBOX(uchar type); /* true iff B bit set */
/*
* This is the binary representation of lwgeom compatible
* with postgresql varlena struct
*/
typedef struct
{
uint32 size; /* varlena header (do not touch directly!) */
uchar type; /* encodes ndims, type, bbox presence,
srid presence */
uchar data[1];
}
PG_LWGEOM;
/*
* Construct a full PG_LWGEOM type (including size header)
* from a serialized form.
* The constructed PG_LWGEOM object will be allocated using palloc
* and the serialized form will be copied.
* If you specify a SRID other then -1 it will be set.
* If you request bbox (wantbbox=1) it will be extracted or computed
* from the serialized form.
*/
extern PG_LWGEOM *PG_LWGEOM_construct(uchar *serialized, int SRID,
int wantbbox);
/*
* Compute bbox of serialized geom
*/
extern int compute_serialized_box2d_p(uchar *serialized_form, BOX2DFLOAT4 *box);
extern BOX3D *compute_serialized_box3d(uchar *serialized_form);
extern int compute_serialized_box3d_p(uchar *serialized_form, BOX3D *box);
/*
* Evaluate with an heuristic if the provided PG_LWGEOM is worth
* caching a bbox
*/
char is_worth_caching_pglwgeom_bbox(const PG_LWGEOM *);
char is_worth_caching_serialized_bbox(const uchar *);
char is_worth_caching_lwgeom_bbox(const LWGEOM *);
/*
* This function computes the size in bytes
* of the serialized geometries.
*/
extern size_t lwgeom_size(const uchar *serialized_form);
extern size_t lwgeom_size_subgeom(const uchar *serialized_form, int geom_number);
extern size_t lwgeom_size_line(const uchar *serialized_line);
extern size_t lwgeom_size_circstring(const uchar *serialized_curve);
extern size_t lwgeom_size_point(const uchar *serialized_point);
extern size_t lwgeom_size_poly(const uchar *serialized_line);
/*--------------------------------------------------------
* all the base types (point/line/polygon) will have a
* basic constructor, basic de-serializer, basic serializer,
* bounding box finder and (TODO) serialized form size finder.
*--------------------------------------------------------*/
/*
* given the LWPOINT serialized form (or a pointer into a muli* one)
* construct a proper LWPOINT.
* serialized_form should point to the 8bit type format (with type = 1)
* Returns NULL if serialized form is not a point.
* See serialized form doc
*/
extern LWPOINT *lwpoint_deserialize(uchar *serialized_form);
/*
* Find size this point would get when serialized (no BBOX)
*/
extern size_t lwpoint_serialize_size(LWPOINT *point);
/*
* convert this point into its serialize form
* result's first char will be the 8bit type.
* See serialized form doc
*/
extern uchar *lwpoint_serialize(LWPOINT *point);
/* same as above, writes to buf */
extern void lwpoint_serialize_buf(LWPOINT *point, uchar *buf, size_t *size);
/*
* find bounding box (standard one)
* zmin=zmax=0 if 2d (might change to NaN)
*/
extern BOX3D *lwpoint_compute_box3d(LWPOINT *point);
/*
* convenience functions to hide the POINTARRAY
*/
extern int lwpoint_getPoint2d_p(const LWPOINT *point, POINT2D *out);
extern int lwpoint_getPoint3dz_p(const LWPOINT *point, POINT3DZ *out);
extern int lwpoint_getPoint3dm_p(const LWPOINT *point, POINT3DM *out);
extern int lwpoint_getPoint4d_p(const LWPOINT *point, POINT4D *out);
/******************************************************************
* LWLINE functions
******************************************************************/
/*
* given the LWGEOM serialized form (or a pointer into a muli* one)
* construct a proper LWLINE.
* serialized_form should point to the 8bit type format (with type = 2)
* See SERIALIZED_FORM doc
*/
extern LWLINE *lwline_deserialize(uchar *serialized_form);
/* find the size this line would get when serialized */
extern size_t lwline_serialize_size(LWLINE *line);
/*
* convert this line into its serialize form
* result's first char will be the 8bit type. See serialized form doc
* copies data.
*/
extern uchar *lwline_serialize(LWLINE *line);
/* same as above, writes to buf */
extern void lwline_serialize_buf(LWLINE *line, uchar *buf, size_t *size);
/*
* find bounding box (standard one) zmin=zmax=0 if 2d (might change to NaN)
*/
extern BOX3D *lwline_compute_box3d(LWLINE *line);
/******************************************************************
* LWPOLY functions
******************************************************************/
/*
* given the LWPOLY serialized form (or a pointer into a muli* one)
* construct a proper LWPOLY.
* serialized_form should point to the 8bit type format (with type = 3)
* See SERIALIZED_FORM doc
*/
extern LWPOLY *lwpoly_deserialize(uchar *serialized_form);
/* find the size this polygon would get when serialized */
extern size_t lwpoly_serialize_size(LWPOLY *poly);
/*
* create the serialized form of the polygon
* result's first char will be the 8bit type. See serialized form doc
* points copied
*/
extern uchar *lwpoly_serialize(LWPOLY *poly);
/* same as above, writes to buf */
extern void lwpoly_serialize_buf(LWPOLY *poly, uchar *buf, size_t *size);
/*
* find bounding box (standard one) zmin=zmax=0 if 2d (might change to NaN)
*/
extern BOX3D *lwpoly_compute_box3d(LWPOLY *poly);
/******************************************************************
* LWCIRCSTRING functions
******************************************************************/
/*
* given the LWGEOM serialized form (or a pointer into a muli* one)
* construct a proper LWCIRCSTRING.
* serialized_form should point to the 8bit type format (with type = 2)
* See SERIALIZED_FORM doc
*/
extern LWCIRCSTRING *lwcircstring_deserialize(uchar *serialized_form);
/* find the size this curve would get when serialized */
extern size_t lwcircstring_serialize_size(LWCIRCSTRING *curve);
/*
* convert this circularstring into its serialize form
* result's first char will be the 8bit type. See serialized form doc
* copies data.
*/
extern uchar *lwcircstring_serialize(LWCIRCSTRING *curve);
/* same as above, writes to buf */
extern void lwcircstring_serialize_buf(LWCIRCSTRING *curve, uchar *buf, size_t *size);
/*
* find bounding box (standard one) zmin=zmax=0 if 2d (might change to NaN)
*/
extern BOX3D *lwcircstring_compute_box3d(LWCIRCSTRING *curve);
/******************************************************************
* LWGEOM functions
******************************************************************/
extern size_t lwgeom_serialize_size(LWGEOM *geom);
extern size_t lwcollection_serialize_size(LWCOLLECTION *coll);
extern void lwgeom_serialize_buf(LWGEOM *geom, uchar *buf, size_t *size);
extern uchar *lwgeom_serialize(LWGEOM *geom);
extern void lwcollection_serialize_buf(LWCOLLECTION *mcoll, uchar *buf, size_t *size);
extern int lwcollection_ngeoms(const LWCOLLECTION *col);
/*
* Deserialize an lwgeom serialized form.
* The deserialized (recursive) structure will store
* pointers to the serialized form (POINTARRAYs).
*/
LWGEOM *lwgeom_deserialize(uchar *serializedform);
BOX3D *lwgeom_compute_box3d(const LWGEOM *geom);
/******************************************************************
* LWMULTIx and LWCOLLECTION functions
******************************************************************/
LWMPOINT *lwmpoint_deserialize(uchar *serializedform);
LWMLINE *lwmline_deserialize(uchar *serializedform);
LWMPOLY *lwmpoly_deserialize(uchar *serializedform);
LWCOLLECTION *lwcollection_deserialize(uchar *serializedform);
LWCOMPOUND *lwcompound_deserialize(uchar *serialized_form);
LWCURVEPOLY *lwcurvepoly_deserialize(uchar *serialized_form);
LWMCURVE *lwmcurve_deserialize(uchar *serialized_form);
LWMSURFACE *lwmsurface_deserialize(uchar *serialized_form);
LWGEOM *lwcollection_getsubgeom(LWCOLLECTION *col, int gnum);
BOX3D *lwcollection_compute_box3d(LWCOLLECTION *col);
/******************************************************************
* SERIALIZED FORM functions
******************************************************************/
/******************************************************************
* Multi-geometries
*
* These are all handled equivelently so its easy to write iterator code.
* NOTE NOTE: you can hand in a non-multigeometry to most of these functions
* and get usual behavior (ie. get geometry 0 on a POINT
* will return the point).
* This makes coding even easier since you dont have to necessarily
* differenciate between the multi* and non-multi geometries.
*
* NOTE: these usually work directly off the serialized form, so
* they're a little more difficult to handle (and slower)
* NOTE NOTE: the get functions maybe slow, so we may want to have an
* "analysed" lwgeom that would just have pointer to the start
* of each sub-geometry.
*
******************************************************************/
/* use this version for speed. READ-ONLY! */
typedef struct
{
int SRID;
const uchar *serialized_form; /* orginal structure */
uchar type; /* 8-bit type for the LWGEOM */
int ngeometries; /* number of sub-geometries */
uchar **sub_geoms; /* list of pointers (into serialized_form)
of the sub-geoms */
}
LWGEOM_INSPECTED;
extern int lwgeom_size_inspected(const LWGEOM_INSPECTED *inspected, int geom_number);
/*
* note - for a simple type (ie. point), this will have
* sub_geom[0] = serialized_form.
* for multi-geomtries sub_geom[0] will be a few bytes into the
* serialized form.
* This function just computes the length of each sub-object and
* pre-caches this info.
* For a geometry collection of multi* geometries, you can inspect
* the sub-components as well.
*/
extern LWGEOM_INSPECTED *lwgeom_inspect(const uchar *serialized_form);
/*
* 1st geometry has geom_number = 0
* if the actual sub-geometry isnt a POINT, null is returned (see _gettype()).
* if there arent enough geometries, return null.
* this is fine to call on a point (with geom_num=0), multipoint
* or geometrycollection
*/
extern LWPOINT *lwgeom_getpoint(uchar *serialized_form, int geom_number);
extern LWPOINT *lwgeom_getpoint_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* 1st geometry has geom_number = 0
* if the actual geometry isnt a LINE, null is returned (see _gettype()).
* if there arent enough geometries, return null.
* this is fine to call on a line, multiline or geometrycollection
*/
extern LWLINE *lwgeom_getline(uchar *serialized_form, int geom_number);
extern LWLINE *lwgeom_getline_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* 1st geometry has geom_number = 0
* if the actual geometry isnt a POLYGON, null is returned (see _gettype()).
* if there arent enough geometries, return null.
* this is fine to call on a polygon, multipolygon or geometrycollection
*/
extern LWPOLY *lwgeom_getpoly(uchar *serialized_form, int geom_number);
extern LWPOLY *lwgeom_getpoly_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* 1st geometry has geom_number = 0
* if the actual geometry isnt a POLYGON, null is returned (see _gettype()).
* if there arent enough geometries, return null.
* this is fine to call on a polygon, multipolygon or geometrycollection
*/
extern LWCIRCSTRING *lwgeom_getcircstring_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
extern LWGEOM *lwgeom_getgeom_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* this gets the serialized form of a sub-geometry
* 1st geometry has geom_number = 0
* if this isnt a multi* geometry, and geom_number ==0 then it returns
* itself
* returns null on problems.
* in the future this is how you would access a muli* portion of a
* geometry collection.
* GEOMETRYCOLLECTION(MULTIPOINT(0 0, 1 1), LINESTRING(0 0, 1 1))
* ie. lwgeom_getpoint( lwgeom_getsubgeometry( serialized, 0), 1)
* --> POINT(1 1)
* you can inspect the sub-geometry as well if you wish.
*/
extern uchar *lwgeom_getsubgeometry(const uchar *serialized_form, int geom_number);
extern uchar *lwgeom_getsubgeometry_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* 1st geometry has geom_number = 0
* use geom_number = -1 to find the actual type of the serialized form.
* ie lwgeom_gettype( <'MULTIPOINT(0 0, 1 1)'>, -1)
* --> multipoint
* ie lwgeom_gettype( <'MULTIPOINT(0 0, 1 1)'>, 0)
* --> point
* gets the 8bit type of the geometry at location geom_number
*/
extern uchar lwgeom_getsubtype(uchar *serialized_form, int geom_number);
extern uchar lwgeom_getsubtype_inspected(LWGEOM_INSPECTED *inspected, int geom_number);
/*
* how many sub-geometries are there?
* for point,line,polygon will return 1.
*/
extern int lwgeom_getnumgeometries(uchar *serialized_form);
extern int lwgeom_getnumgeometries_inspected(LWGEOM_INSPECTED *inspected);
/*
* set finalType to COLLECTIONTYPE or 0 (0 means choose a best type)
* (ie. give it 2 points and ask it to be a multipoint)
* use SRID=-1 for unknown SRID (will have 8bit type's S = 0)
* all subgeometries must have the same SRID
* if you want to construct an inspected, call this then inspect the result...
*/
extern uchar *lwgeom_serialized_construct(int SRID, int finalType, char hasz, char hasm, int nsubgeometries, uchar **serialized_subs);
/* construct the empty geometry (GEOMETRYCOLLECTION(EMPTY)) */
extern uchar *lwgeom_constructempty(int SRID, char hasz, char hasm);
extern void lwgeom_constructempty_buf(int SRID, char hasz, char hasm, uchar *buf, size_t *size);
size_t lwgeom_empty_length(int SRID);
/*
* get the SRID from the LWGEOM
* none present => -1
*/
extern int lwgeom_getsrid(uchar *serialized);
/*------------------------------------------------------
* other stuff
*
* handle the double-to-float conversion. The results of this
* will usually be a slightly bigger box because of the difference
* between float8 and float4 representations.
*/
extern BOX2DFLOAT4 *box3d_to_box2df(BOX3D *box);
extern int box3d_to_box2df_p(BOX3D *box, BOX2DFLOAT4 *res);
extern BOX3D box2df_to_box3d(BOX2DFLOAT4 *box);
extern void box2df_to_box3d_p(BOX2DFLOAT4 *box, BOX3D *box3d);
extern BOX3D *box3d_union(BOX3D *b1, BOX3D *b2);
extern int box3d_union_p(BOX3D *b1, BOX3D *b2, BOX3D *ubox);
/*
* Returns a pointer to the BBOX internal to the serialized form.
* READ-ONLY!
* Or NULL if serialized form does not have a BBOX
* OBSOLETED to avoid memory alignment problems.
*/
/*extern BOX2DFLOAT4 *getbox2d_internal(uchar *serialized_form);*/
/*
* this function writes to 'box' and returns 0 if serialized_form
* does not have a bounding box (empty geom)
*/
extern int getbox2d_p(uchar *serialized_form, BOX2DFLOAT4 *box);
/* Expand given box of 'd' units in all directions */
void expand_box2d(BOX2DFLOAT4 *box, double d);
void expand_box3d(BOX3D *box, double d);
/* Check if to boxes are equal (considering FLOAT approximations) */
char box2d_same(BOX2DFLOAT4 *box1, BOX2DFLOAT4 *box2);
/****************************************************************
* MEMORY MANAGEMENT
****************************************************************/
/*
* The lwfree_* family of functions frees *all* memory associated
* with the pointer, including the serialized__pointlist in the
* point arrays. Do not use these on LWGEOMs de-serialized from
* PG_LWGEOMs or they will try to free an underlying structure
* managed by PgSQL. Only use these on LWGEOMs you have
* constructed yourself.
*/
extern void ptarray_free(POINTARRAY *pa);
extern void lwpoint_free(LWPOINT *pt);
extern void lwline_free(LWLINE *line);
extern void lwpoly_free(LWPOLY *poly);
extern void lwmpoint_free(LWMPOINT *mpt);
extern void lwmline_free(LWMLINE *mline);
extern void lwmpoly_free(LWMPOLY *mpoly);
extern void lwcollection_free(LWCOLLECTION *col);
extern void lwcircstring_free(LWCIRCSTRING *curve);
extern void lwgeom_free(LWGEOM *geom);
extern void lwinspected_release(LWGEOM_INSPECTED *inspected); /* TODO: make this deep free... */
/*
* The *_release family of functions frees the LWGEOM structures
* surrounding the POINTARRAYs but leaves the POINTARRAYs
* intact. Use these on LWGEOMs that have been de-serialized
* from PG_LWGEOMs. Do not use these on LWGEOMs you have
* constructed yourself, or you will leak lots of memory.
*/
extern void lwpoint_release(LWPOINT *lwpoint);
extern void lwline_release(LWLINE *lwline);
extern void lwpoly_release(LWPOLY *lwpoly);
extern void lwcircstring_release(LWCIRCSTRING *lwcirc);
extern void lwmpoint_release(LWMPOINT *lwpoint);
extern void lwmline_release(LWMLINE *lwline);
extern void lwmpoly_release(LWMPOLY *lwpoly);
extern void lwcollection_release(LWCOLLECTION *lwcollection);
extern void lwgeom_release(LWGEOM *lwgeom);
/****************************************************************
* utility
****************************************************************/
extern uint32 lw_get_uint32(const uchar *loc);
extern int32 lw_get_int32(const uchar *loc);
extern void printBOX3D(BOX3D *b);
extern void printPA(POINTARRAY *pa);
extern void printLWPOINT(LWPOINT *point);
extern void printLWLINE(LWLINE *line);
extern void printLWPOLY(LWPOLY *poly);
extern void printBYTES(uchar *a, int n);
extern void printMULTI(uchar *serialized);
extern void printType(uchar str);
extern float LWGEOM_Minf(float a, float b);
extern float LWGEOM_Maxf(float a, float b);
extern double LWGEOM_Mind(double a, double b);
extern double LWGEOM_Maxd(double a, double b);
extern float nextDown_f(double d);
extern float nextUp_f(double d);
extern double nextDown_d(float d);
extern double nextUp_d(float d);
extern float nextafterf_custom(float x, float y);
#define LW_MAX(a,b) ((a) > (b) ? (a) : (b))
#define LW_MIN(a,b) ((a) <= (b) ? (a) : (b))
#define LW_ABS(a) ((a) < (0) ? (-a) : (a))
/* general utilities */
extern double lwgeom_polygon_area(LWPOLY *poly);
extern double lwgeom_polygon_perimeter(LWPOLY *poly);
extern double lwgeom_polygon_perimeter2d(LWPOLY *poly);
extern double lwgeom_pointarray_length2d(POINTARRAY *pts);
extern double lwgeom_pointarray_length(POINTARRAY *pts);
extern void lwgeom_force2d_recursive(uchar *serialized, uchar *optr, size_t *retsize);
extern void lwgeom_force3dz_recursive(uchar *serialized, uchar *optr, size_t *retsize);
extern void lwgeom_force3dm_recursive(uchar *serialized, uchar *optr, size_t *retsize);
extern void lwgeom_force4d_recursive(uchar *serialized, uchar *optr, size_t *retsize);
extern double distance2d_pt_pt(POINT2D *p1, POINT2D *p2);
extern double distance2d_pt_seg(POINT2D *p, POINT2D *A, POINT2D *B);
extern double distance2d_seg_seg(POINT2D *A, POINT2D *B, POINT2D *C, POINT2D *D);
extern double distance2d_pt_ptarray(POINT2D *p, POINTARRAY *pa);
extern double distance2d_ptarray_ptarray(POINTARRAY *l1, POINTARRAY *l2);
extern int pt_in_ring_2d(POINT2D *p, POINTARRAY *ring);
extern int pt_in_poly_2d(POINT2D *p, LWPOLY *poly);
extern double distance2d_ptarray_poly(POINTARRAY *pa, LWPOLY *poly);
extern double distance2d_point_point(LWPOINT *point1, LWPOINT *point2);
extern double distance2d_point_line(LWPOINT *point, LWLINE *line);
extern double distance2d_line_line(LWLINE *line1, LWLINE *line2);
extern double distance2d_point_poly(LWPOINT *point, LWPOLY *poly);
extern double distance2d_poly_poly(LWPOLY *poly1, LWPOLY *poly2);
extern double distance2d_line_poly(LWLINE *line, LWPOLY *poly);
extern int azimuth_pt_pt(POINT2D *p1, POINT2D *p2, double *ret);
extern double lwgeom_mindistance2d_recursive(uchar *lw1, uchar *lw2);
extern double lwgeom_mindistance2d_recursive_tolerance(uchar *lw1, uchar *lw2, double tolerance);
extern int lwgeom_pt_inside_circle(POINT2D *p, double cx, double cy, double rad);
extern char ptarray_isccw(const POINTARRAY *pa);
extern void lwgeom_reverse(LWGEOM *lwgeom);
extern void lwline_reverse(LWLINE *line);
extern void lwpoly_reverse(LWPOLY *poly);
extern void lwpoly_forceRHR(LWPOLY *poly);
extern void lwgeom_force_rhr(LWGEOM *lwgeom);
extern char *lwgeom_summary(LWGEOM *lwgeom, int offset);
extern const char *lwgeom_typename(int type);
extern int ptarray_compute_box2d_p(const POINTARRAY *pa, BOX2DFLOAT4 *result);
extern BOX2DFLOAT4 *ptarray_compute_box2d(const POINTARRAY *pa);
extern int lwpoint_compute_box2d_p(LWPOINT *point, BOX2DFLOAT4 *box);
extern int lwline_compute_box2d_p(LWLINE *line, BOX2DFLOAT4 *box);
extern int lwpoly_compute_box2d_p(LWPOLY *poly, BOX2DFLOAT4 *box);
extern int lwcollection_compute_box2d_p(LWCOLLECTION *col, BOX2DFLOAT4 *box);
extern int lwcircstring_compute_box2d_p(LWCIRCSTRING *curve, BOX2DFLOAT4 *box);
extern BOX2DFLOAT4 *lwgeom_compute_box2d(LWGEOM *lwgeom);
extern void interpolate_point4d(POINT4D *A, POINT4D *B, POINT4D *I, double F);
/* return alloced memory */
extern BOX2DFLOAT4 *box2d_union(BOX2DFLOAT4 *b1, BOX2DFLOAT4 *b2);
/* args may overlap ! */
extern int box2d_union_p(BOX2DFLOAT4 *b1, BOX2DFLOAT4 *b2, BOX2DFLOAT4 *ubox);
extern int lwgeom_compute_box2d_p(LWGEOM *lwgeom, BOX2DFLOAT4 *box);
void lwgeom_longitude_shift(LWGEOM *lwgeom);
/**
* @brief Check whether or not a lwgeom is big enough to warrant a bounding box.
*
* Check whether or not a lwgeom is big enough to warrant a bounding box
* when stored in the serialized form on disk. Currently only points are
* considered small enough to not require a bounding box, because the
* index operations can generate a large number of box-retrieval operations
* when scanning keys.
*/
extern int lwgeom_needs_bbox(LWGEOM *geom);
/**
* Count the total number of vertices in any #LWGEOM.
*/
extern int lwgeom_count_vertices(LWGEOM *geom);
extern int32 lwgeom_npoints(uchar *serialized);
/* Is lwgeom1 geometrically equal to lwgeom2 ? */
char lwgeom_same(const LWGEOM *lwgeom1, const LWGEOM *lwgeom2);
char ptarray_same(const POINTARRAY *pa1, const POINTARRAY *pa2);
char lwpoint_same(const LWPOINT *p1, const LWPOINT *p2);
char lwline_same(const LWLINE *p1, const LWLINE *p2);
char lwpoly_same(const LWPOLY *p1, const LWPOLY *p2);
char lwcollection_same(const LWCOLLECTION *p1, const LWCOLLECTION *p2);
/*
* Add 'what' to 'to' at position 'where'.
* where=0 == prepend
* where=-1 == append
* Mix of dimensions is not allowed (TODO: allow it?).
* Returns a newly allocated LWGEOM (with NO BBOX)
*/
extern LWGEOM *lwgeom_add(const LWGEOM *to, uint32 where, const LWGEOM *what);
LWGEOM *lwpoint_add(const LWPOINT *to, uint32 where, const LWGEOM *what);
LWGEOM *lwline_add(const LWLINE *to, uint32 where, const LWGEOM *what);
LWGEOM *lwpoly_add(const LWPOLY *to, uint32 where, const LWGEOM *what);
LWGEOM *lwmpoly_add(const LWMPOLY *to, uint32 where, const LWGEOM *what);
LWGEOM *lwmline_add(const LWMLINE *to, uint32 where, const LWGEOM *what);
LWGEOM *lwmpoint_add(const LWMPOINT *to, uint32 where, const LWGEOM *what);
LWGEOM *lwcollection_add(const LWCOLLECTION *to, uint32 where, const LWGEOM *what);
LWGEOM *lwcompound_add(const LWCOMPOUND *to, uint32 where, const LWGEOM *what);
LWGEOM *lwcurvepoly_add(const LWCURVEPOLY *to, uint32 where, const LWGEOM *what);
LWGEOM *lwmcurve_add(const LWMCURVE *to, uint32 where, const LWGEOM *what);
LWGEOM *lwmsurface_add(const LWMSURFACE *to, uint32 where, const LWGEOM *what);
LWGEOM *lwcircstring_add(const LWCIRCSTRING *to, uint32 where, const LWGEOM *what);
/*
* Clone an LWGEOM
* pointarray are not copied.
* BBOXes are copied
*/
extern LWGEOM *lwgeom_clone(const LWGEOM *lwgeom);
extern LWPOINT *lwpoint_clone(const LWPOINT *lwgeom);
extern LWLINE *lwline_clone(const LWLINE *lwgeom);
extern LWPOLY *lwpoly_clone(const LWPOLY *lwgeom);
extern LWCOLLECTION *lwcollection_clone(const LWCOLLECTION *lwgeom);
extern LWCIRCSTRING *lwcircstring_clone(const LWCIRCSTRING *curve);
extern BOX2DFLOAT4 *box2d_clone(const BOX2DFLOAT4 *lwgeom);
extern POINTARRAY *ptarray_clone(const POINTARRAY *ptarray);
/*
* Geometry constructors
* Take ownership of arguments
*/
extern LWPOINT *lwpoint_construct(int SRID, BOX2DFLOAT4 *bbox,
POINTARRAY *point);
extern LWLINE *lwline_construct(int SRID, BOX2DFLOAT4 *bbox,
POINTARRAY *points);
/*
* Construct a new LWPOLY. arrays (points/points per ring) will NOT be copied
* use SRID=-1 for unknown SRID (will have 8bit type's S = 0)
*/
extern LWPOLY *lwpoly_construct(int SRID, BOX2DFLOAT4 *bbox,
unsigned int nrings, POINTARRAY **points);
extern LWCOLLECTION *lwcollection_construct(unsigned int type, int SRID,
BOX2DFLOAT4 *bbox, unsigned int ngeoms, LWGEOM **geoms);
extern LWCOLLECTION *lwcollection_construct_empty(int SRID,
char hasZ, char hasM);
/*
* Construct a new LWCIRCSTRING. arrays (points/points per ring) will NOT be copied
* use SRID=-1 for unknown SRID (will have 8bit type's S = 0)
*/
extern LWCIRCSTRING *lwcircstring_construct(int SRID, BOX2DFLOAT4 *bbox, POINTARRAY *points);
/* Other constructors */
extern LWPOINT *make_lwpoint2d(int SRID, double x, double y);
extern LWPOINT *make_lwpoint3dz(int SRID, double x, double y, double z);
extern LWPOINT *make_lwpoint3dm(int SRID, double x, double y, double m);
extern LWPOINT *make_lwpoint4d(int SRID, double x, double y, double z, double m);
extern LWLINE *lwline_from_lwpointarray(int SRID, unsigned int npoints, LWPOINT **points);
extern LWLINE *lwline_from_lwmpoint(int SRID, LWMPOINT *mpoint);
extern LWLINE *lwline_addpoint(LWLINE *line, LWPOINT *point, unsigned int where);
extern LWLINE *lwline_removepoint(LWLINE *line, unsigned int which);
extern void lwline_setPoint4d(LWLINE *line, unsigned int which, POINT4D *newpoint);
extern LWPOLY *lwpoly_from_lwlines(const LWLINE *shell, unsigned int nholes, const LWLINE **holes);
/* Return a char string with ASCII versionf of type flags */
extern const char *lwgeom_typeflags(uchar type);
/* Construct an empty pointarray */
extern POINTARRAY *ptarray_construct(char hasz, char hasm, unsigned int npoints);
/*
* extern POINTARRAY *ptarray_construct2d(uint32 npoints, const POINT2D *pts);
* extern POINTARRAY *ptarray_construct3dz(uint32 npoints, const POINT3DZ *pts);
* extern POINTARRAY *ptarray_construct3dm(uint32 npoints, const POINT3DM *pts);
* extern POINTARRAY *ptarray_construct4d(uint32 npoints, const POINT4D *pts);
*/
extern POINTARRAY *ptarray_addPoint(POINTARRAY *pa, uchar *p, size_t pdims,
unsigned int where);
extern POINTARRAY *ptarray_removePoint(POINTARRAY *pa, unsigned int where);
extern int ptarray_isclosed2d(const POINTARRAY *pa);
extern void ptarray_longitude_shift(POINTARRAY *pa);
extern int32 lwgeom_nrings_recursive(uchar *serialized);
extern void ptarray_reverse(POINTARRAY *pa);
extern POINTARRAY *ptarray_substring(POINTARRAY *, double, double);
extern double ptarray_locate_point(POINTARRAY *, POINT2D *);
extern void closest_point_on_segment(POINT2D *p, POINT2D *A, POINT2D *B, POINT2D *ret);
/*
* Ensure every segment is at most 'dist' long.
* Returned LWGEOM might is unchanged if a POINT.
*/
extern LWGEOM *lwgeom_segmentize2d(LWGEOM *line, double dist);
extern POINTARRAY *ptarray_segmentize2d(POINTARRAY *ipa, double dist);
extern LWLINE *lwline_segmentize2d(LWLINE *line, double dist);
extern LWPOLY *lwpoly_segmentize2d(LWPOLY *line, double dist);
extern LWCOLLECTION *lwcollection_segmentize2d(LWCOLLECTION *coll, double dist);
extern uchar parse_hex(char *str);
extern void deparse_hex(uchar str, char *result);
/* Parser check flags */
#define PARSER_CHECK_MINPOINTS 1
#define PARSER_CHECK_ODD 2
#define PARSER_CHECK_CLOSURE 4
#define PARSER_CHECK_NONE 0
#define PARSER_CHECK_ALL (PARSER_CHECK_MINPOINTS | PARSER_CHECK_ODD | PARSER_CHECK_CLOSURE)
/*
* Parser result structure: returns the result of attempting to convert (E)WKT/(E)WKB to LWGEOM
*/
typedef struct struct_lwgeom_parser_result
{
const char *wkinput; /* Copy of pointer to input WKT/WKB */
uchar *serialized_lwgeom; /* Pointer to serialized LWGEOM */
int size; /* Size of serialized LWGEOM in bytes */
const char *message; /* Error/warning message */
int errlocation; /* Location of error */
}
LWGEOM_PARSER_RESULT;
/*
* Parser error messages (these must match the message array in lwgparse.c)
*/
#define PARSER_ERROR_MOREPOINTS 1
#define PARSER_ERROR_ODDPOINTS 2
#define PARSER_ERROR_UNCLOSED 3
#define PARSER_ERROR_MIXDIMS 4
#define PARSER_ERROR_INVALIDGEOM 5
#define PARSER_ERROR_INVALIDWKBTYPE 6
#define PARSER_ERROR_INCONTINUOUS 7
/*
* Unparser result structure: returns the result of attempting to convert LWGEOM to (E)WKT/(E)WKB
*/
typedef struct struct_lwgeom_unparser_result
{
uchar *serialized_lwgeom; /* Copy of pointer to input serialized LWGEOM */
char *wkoutput; /* Pointer to WKT or WKB output */
int size; /* Size of serialized LWGEOM in bytes */
const char *message; /* Error/warning message */
int errlocation; /* Location of error */
}
LWGEOM_UNPARSER_RESULT;
/*
* Unparser error messages (these must match the message array in lwgunparse.c)
*/
#define UNPARSER_ERROR_MOREPOINTS 1
#define UNPARSER_ERROR_ODDPOINTS 2
#define UNPARSER_ERROR_UNCLOSED 3
/* Parser access routines */
extern char *lwgeom_to_ewkt(LWGEOM *lwgeom, int flags);
extern char *lwgeom_to_hexwkb(LWGEOM *lwgeom, int flags, unsigned int byteorder);
extern LWGEOM *lwgeom_from_ewkb(uchar *ewkb, int flags, size_t ewkblen);
extern LWGEOM *lwgeom_from_ewkt(char *ewkt, int flags);
extern uchar *lwgeom_to_ewkb(LWGEOM *lwgeom, int flags, char byteorder, size_t *ewkblen);
extern int serialized_lwgeom_to_ewkt(LWGEOM_UNPARSER_RESULT *lwg_unparser_result, uchar *serialized, int flags);
extern int serialized_lwgeom_from_ewkt(LWGEOM_PARSER_RESULT *lwg_parser_result, char *wkt_input, int flags);
extern int serialized_lwgeom_to_hexwkb(LWGEOM_UNPARSER_RESULT *lwg_unparser_result, uchar *serialized, int flags, unsigned int byteorder);
extern int serialized_lwgeom_from_hexwkb(LWGEOM_PARSER_RESULT *lwg_parser_result, char *hexwkb_input, int flags);
extern int serialized_lwgeom_to_ewkb(LWGEOM_UNPARSER_RESULT *lwg_unparser_result, uchar *serialized, int flags, unsigned int byteorder);
extern void *lwalloc(size_t size);
extern void *lwrealloc(void *mem, size_t size);
extern void lwfree(void *mem);
/* Utilities */
extern void trim_trailing_zeros(char *num);
extern char *lwmessage_truncate(char *str, int startpos, int endpos, int maxlength, int truncdirection);
/* Machine endianness */
#define XDR 0
#define NDR 1
extern char getMachineEndian(void);
void errorIfSRIDMismatch(int srid1, int srid2);
/*******************************************************************************
* SQLMM internal functions - TODO: Move into separate header files
******************************************************************************/
uint32 has_arc(LWGEOM *geom);
double lwcircle_center(POINT4D *p1, POINT4D *p2, POINT4D *p3, POINT4D **result);
LWGEOM *lwgeom_segmentize(LWGEOM *geom, uint32 perQuad);
LWGEOM *lwgeom_desegmentize(LWGEOM *geom);
extern double lwgeom_curvepolygon_area(LWCURVEPOLY *curvepoly);
double lwcircle_center(POINT4D *p1, POINT4D *p2, POINT4D *p3, POINT4D **result);
#endif /* !defined _LIBLWGEOM_H */
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