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652 lines
22 KiB
C++
652 lines
22 KiB
C++
/*
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Copyright (c) 2002, 2013, Oracle and/or its affiliates.
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Copyright (c) 2009, 2013, Monty Program Ab.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#ifndef SPATIAL_INCLUDED
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#define SPATIAL_INCLUDED
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#include "sql_string.h" /* String, LEX_STRING */
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#include <my_compiler.h>
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#include <json_lib.h>
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class Gis_read_stream;
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#include "gcalc_tools.h"
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const uint SRID_SIZE= 4;
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const uint SIZEOF_STORED_DOUBLE= 8;
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const uint POINT_DATA_SIZE= (SIZEOF_STORED_DOUBLE * 2);
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const uint WKB_HEADER_SIZE= 1+4;
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const uint32 GET_SIZE_ERROR= ((uint32) -1);
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struct st_point_2d
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{
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double x;
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double y;
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};
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struct st_linear_ring
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{
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uint32 n_points;
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st_point_2d points;
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};
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/***************************** MBR *******************************/
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/*
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It's ok that a lot of the functions are inline as these are only used once
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in MySQL
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*/
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struct MBR
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{
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double xmin, ymin, xmax, ymax;
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MBR()
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{
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xmin= ymin= DBL_MAX;
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xmax= ymax= -DBL_MAX;
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}
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MBR(const double xmin_arg, const double ymin_arg,
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const double xmax_arg, const double ymax_arg)
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:xmin(xmin_arg), ymin(ymin_arg), xmax(xmax_arg), ymax(ymax_arg)
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{}
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MBR(const st_point_2d &min, const st_point_2d &max)
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:xmin(min.x), ymin(min.y), xmax(max.x), ymax(max.y)
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{}
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MBR(const MBR &mbr1, const MBR &mbr2)
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:xmin(mbr1.xmin), ymin(mbr1.ymin), xmax(mbr1.xmax), ymax(mbr1.ymax)
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{ add_mbr(&mbr2); }
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inline void add_xy(double x, double y)
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{
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/* Not using "else" for proper one point MBR calculation */
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if (x < xmin)
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xmin= x;
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if (x > xmax)
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xmax= x;
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if (y < ymin)
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ymin= y;
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if (y > ymax)
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ymax= y;
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}
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void add_xy(const char *px, const char *py)
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{
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double x, y;
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float8get(x, px);
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float8get(y, py);
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add_xy(x,y);
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}
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void add_mbr(const MBR *mbr)
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{
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if (mbr->xmin < xmin)
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xmin= mbr->xmin;
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if (mbr->xmax > xmax)
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xmax= mbr->xmax;
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if (mbr->ymin < ymin)
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ymin= mbr->ymin;
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if (mbr->ymax > ymax)
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ymax= mbr->ymax;
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}
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void buffer(double d)
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{
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xmin-= d;
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ymin-= d;
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xmax+= d;
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ymax+= d;
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}
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int equals(const MBR *mbr)
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{
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/* The following should be safe, even if we compare doubles */
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return ((mbr->xmin == xmin) && (mbr->ymin == ymin) &&
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(mbr->xmax == xmax) && (mbr->ymax == ymax));
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}
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int disjoint(const MBR *mbr)
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{
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/* The following should be safe, even if we compare doubles */
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return ((mbr->xmin > xmax) || (mbr->ymin > ymax) ||
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(mbr->xmax < xmin) || (mbr->ymax < ymin));
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}
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int intersects(const MBR *mbr)
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{
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return !disjoint(mbr);
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}
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int touches(const MBR *mbr)
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{
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/* The following should be safe, even if we compare doubles */
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return ((mbr->xmin == xmax || mbr->xmax == xmin) &&
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((mbr->ymin >= ymin && mbr->ymin <= ymax) ||
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(mbr->ymax >= ymin && mbr->ymax <= ymax))) ||
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((mbr->ymin == ymax || mbr->ymax == ymin) &&
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((mbr->xmin >= xmin && mbr->xmin <= xmax) ||
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(mbr->xmax >= xmin && mbr->xmax <= xmax)));
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}
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int within(const MBR *mbr);
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int contains(const MBR *mbr)
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{
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/* The following should be safe, even if we compare doubles */
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return ((mbr->xmin >= xmin) && (mbr->ymin >= ymin) &&
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(mbr->xmax <= xmax) && (mbr->ymax <= ymax));
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}
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bool inner_point(double x, double y) const
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{
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/* The following should be safe, even if we compare doubles */
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return (xmin<x) && (xmax>x) && (ymin<y) && (ymax>y);
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}
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/**
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The dimension maps to an integer as:
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- Polygon -> 2
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- Horizontal or vertical line -> 1
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- Point -> 0
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- Invalid MBR -> -1
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*/
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int dimension() const
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{
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int d= 0;
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if (xmin > xmax)
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return -1;
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else if (xmin < xmax)
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d++;
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if (ymin > ymax)
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return -1;
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else if (ymin < ymax)
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d++;
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return d;
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}
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int overlaps(const MBR *mbr)
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{
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/*
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overlaps() requires that some point inside *this is also inside
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*mbr, and that both geometries and their intersection are of the
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same dimension.
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*/
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int d = dimension();
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if (d != mbr->dimension() || d <= 0 || contains(mbr) || within(mbr))
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return 0;
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MBR intersection(MY_MAX(xmin, mbr->xmin), MY_MAX(ymin, mbr->ymin),
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MY_MIN(xmax, mbr->xmax), MY_MIN(ymax, mbr->ymax));
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return (d == intersection.dimension());
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}
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int valid() const
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{ return xmin <= xmax && ymin <= ymax; }
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};
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/***************************** Geometry *******************************/
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struct Geometry_buffer;
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class Geometry
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{
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public:
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Geometry() = default; /* Remove gcc warning */
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virtual ~Geometry() = default; /* Remove gcc warning */
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static void *operator new(size_t size, void *buffer)
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{
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return buffer;
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}
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static void operator delete(void *ptr, void *buffer)
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{}
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static void operator delete(void *buffer)
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{}
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enum wkbType
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{
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wkb_point= 1,
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wkb_linestring= 2,
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wkb_polygon= 3,
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wkb_multipoint= 4,
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wkb_multilinestring= 5,
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wkb_multipolygon= 6,
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wkb_geometrycollection= 7,
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wkb_last=7
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};
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enum wkbByteOrder
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{
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wkb_xdr= 0, /* Big Endian */
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wkb_ndr= 1 /* Little Endian */
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};
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enum geojson_errors
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{
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GEOJ_INCORRECT_GEOJSON= 1,
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GEOJ_TOO_FEW_POINTS= 2,
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GEOJ_POLYGON_NOT_CLOSED= 3,
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GEOJ_DIMENSION_NOT_SUPPORTED= 4,
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GEOJ_EMPTY_COORDINATES= 5,
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};
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/** Callback which creates Geometry objects on top of a given placement. */
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typedef Geometry *(*create_geom_t)(char *);
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class Class_info
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{
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public:
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LEX_STRING m_name;
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LEX_STRING m_geojson_name;
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int m_type_id;
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create_geom_t m_create_func;
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Class_info(const char *name, const char *gejson_name,
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int type_id, create_geom_t create_func);
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};
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virtual const Class_info *get_class_info() const=0;
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virtual uint32 get_data_size() const=0;
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virtual bool init_from_wkt(Gis_read_stream *trs, String *wkb)=0;
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/* returns the length of the wkb that was read */
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virtual uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo,
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String *res)=0;
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virtual uint init_from_opresult(String *bin,
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const char *opres, uint res_len)
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{ return init_from_wkb(opres + 4, UINT_MAX32, wkb_ndr, bin) + 4; }
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virtual bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb)
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{ return true; }
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virtual bool get_data_as_wkt(String *txt, const char **end) const=0;
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virtual bool get_data_as_json(String *txt, uint max_dec_digits,
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const char **end) const=0;
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virtual bool get_mbr(MBR *mbr, const char **end) const=0;
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virtual bool dimension(uint32 *dim, const char **end) const=0;
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virtual int get_x(double *x) const { return -1; }
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virtual int get_y(double *y) const { return -1; }
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virtual int geom_length(double *len, const char **end) const { return -1; }
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virtual int area(double *ar, const char **end) const { return -1;}
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virtual int is_closed(int *closed) const { return -1; }
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virtual int num_interior_ring(uint32 *n_int_rings) const { return -1; }
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virtual int num_points(uint32 *n_points) const { return -1; }
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virtual int num_geometries(uint32 *num) const { return -1; }
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virtual int start_point(String *point) const { return -1; }
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virtual int end_point(String *point) const { return -1; }
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virtual int exterior_ring(String *ring) const { return -1; }
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virtual int centroid(String *point) const { return -1; }
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virtual int point_n(uint32 num, String *result) const { return -1; }
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virtual int interior_ring_n(uint32 num, String *result) const { return -1; }
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virtual int geometry_n(uint32 num, String *result) const { return -1; }
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virtual int store_shapes(Gcalc_shape_transporter *trn) const=0;
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public:
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static Geometry *create_by_typeid(Geometry_buffer *buffer, int type_id);
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static Geometry *construct(Geometry_buffer *buffer,
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const char *data, uint32 data_len);
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static Geometry *create_from_wkt(Geometry_buffer *buffer,
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Gis_read_stream *trs, String *wkt,
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bool init_stream=1);
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static Geometry *create_from_wkb(Geometry_buffer *buffer,
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const char *wkb, uint32 len, String *res);
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static Geometry *create_from_json(Geometry_buffer *buffer, json_engine_t *je,
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bool er_on_3D, String *res);
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static Geometry *create_from_opresult(Geometry_buffer *g_buf,
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String *res, Gcalc_result_receiver &rr);
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static uint get_key_image_itMBR(LEX_CSTRING &src, uchar *buff, uint length);
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int as_wkt(String *wkt, const char **end);
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int as_json(String *wkt, uint max_dec_digits, const char **end);
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int bbox_as_json(String *wkt);
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inline void set_data_ptr(const char *data, uint32 data_len)
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{
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m_data= data;
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m_data_end= data + data_len;
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}
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inline void shift_wkb_header()
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{
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m_data+= WKB_HEADER_SIZE;
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}
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const char *get_data_ptr() const
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{
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return m_data;
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}
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bool envelope(String *result) const;
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static Class_info *ci_collection[wkb_last+1];
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static bool create_point(String *result, double x, double y);
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protected:
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static Class_info *find_class(int type_id)
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{
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return ((type_id < wkb_point) || (type_id > wkb_last)) ?
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NULL : ci_collection[type_id];
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}
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static Class_info *find_class(const char *name, size_t len);
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const char *append_points(String *txt, uint32 n_points,
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const char *data, uint32 offset) const;
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bool create_point(String *result, const char *data) const;
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const char *get_mbr_for_points(MBR *mbr, const char *data, uint offset)
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const;
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public:
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/**
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Check if there're enough data remaining as requested
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@arg cur_data pointer to the position in the binary form
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@arg data_amount number of points expected
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@return true if not enough data
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*/
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inline bool no_data(const char *cur_data, size_t data_amount) const
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{
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return (cur_data + data_amount > m_data_end);
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}
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/**
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Check if there're enough points remaining as requested
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Need to perform the calculation in logical units, since multiplication
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can overflow the size data type.
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@arg data pointer to the beginning of the points array
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@arg expected_points number of points expected
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@arg extra_point_space extra space for each point element in the array
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@return true if there are not enough points
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*/
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inline bool not_enough_points(const char *data, uint32 expected_points,
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uint32 extra_point_space = 0) const
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{
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return (m_data_end < data ||
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(expected_points > ((m_data_end - data) /
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(POINT_DATA_SIZE + extra_point_space))));
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}
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protected:
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const char *m_data;
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const char *m_data_end;
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};
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/***************************** Point *******************************/
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class Gis_point: public Geometry
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{
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public:
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Gis_point() = default; /* Remove gcc warning */
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virtual ~Gis_point() = default; /* Remove gcc warning */
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uint32 get_data_size() const override;
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bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
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uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
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bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
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bool get_data_as_wkt(String *txt, const char **end) const override;
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bool get_data_as_json(String *txt, uint max_dec_digits,
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const char **end) const override;
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bool get_mbr(MBR *mbr, const char **end) const override;
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int get_xy(double *x, double *y) const
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{
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const char *data= m_data;
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if (no_data(data, SIZEOF_STORED_DOUBLE * 2))
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return 1;
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float8get(*x, data);
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float8get(*y, data + SIZEOF_STORED_DOUBLE);
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return 0;
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}
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int get_xy_radian(double *x, double *y) const
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{
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if (!get_xy(x, y))
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{
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*x= (*x)*M_PI/180;
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*y= (*y)*M_PI/180;
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return 0;
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}
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return 1;
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}
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int get_x(double *x) const override
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{
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if (no_data(m_data, SIZEOF_STORED_DOUBLE))
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return 1;
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float8get(*x, m_data);
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return 0;
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}
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int get_y(double *y) const override
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{
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const char *data= m_data;
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if (no_data(data, SIZEOF_STORED_DOUBLE * 2)) return 1;
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float8get(*y, data + SIZEOF_STORED_DOUBLE);
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return 0;
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}
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int geom_length(double *len, const char **end) const override;
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int area(double *ar, const char **end) const override;
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bool dimension(uint32 *dim, const char **end) const override
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{
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*dim= 0;
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*end= 0; /* No default end */
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return 0;
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}
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int store_shapes(Gcalc_shape_transporter *trn) const override;
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const Class_info *get_class_info() const override;
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double calculate_haversine(const Geometry *g, const double sphere_radius,
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int *error);
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int spherical_distance_multipoints(Geometry *g, const double r, double *result,
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int *error);
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};
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/***************************** LineString *******************************/
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class Gis_line_string: public Geometry
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{
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public:
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Gis_line_string() = default; /* Remove gcc warning */
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virtual ~Gis_line_string() = default; /* Remove gcc warning */
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uint32 get_data_size() const override;
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bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
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uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
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bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
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bool get_data_as_wkt(String *txt, const char **end) const override;
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bool get_data_as_json(String *txt, uint max_dec_digits,
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const char **end) const override;
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bool get_mbr(MBR *mbr, const char **end) const override;
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int geom_length(double *len, const char **end) const override;
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int area(double *ar, const char **end) const override;
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int is_closed(int *closed) const override;
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int num_points(uint32 *n_points) const override;
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int start_point(String *point) const override;
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int end_point(String *point) const override;
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int point_n(uint32 n, String *result) const override;
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bool dimension(uint32 *dim, const char **end) const override
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{
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*dim= 1;
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*end= 0; /* No default end */
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return 0;
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}
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int store_shapes(Gcalc_shape_transporter *trn) const override;
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const Class_info *get_class_info() const override;
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};
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/***************************** Polygon *******************************/
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class Gis_polygon: public Geometry
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{
|
|
public:
|
|
Gis_polygon() = default; /* Remove gcc warning */
|
|
virtual ~Gis_polygon() = default; /* Remove gcc warning */
|
|
uint32 get_data_size() const override;
|
|
bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
|
|
uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
|
|
uint init_from_opresult(String *bin, const char *opres, uint res_len) override;
|
|
bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
|
|
bool get_data_as_wkt(String *txt, const char **end) const override;
|
|
bool get_data_as_json(String *txt, uint max_dec_digits,
|
|
const char **end) const override;
|
|
bool get_mbr(MBR *mbr, const char **end) const override;
|
|
int area(double *ar, const char **end) const override;
|
|
int exterior_ring(String *result) const override;
|
|
int num_interior_ring(uint32 *n_int_rings) const override;
|
|
int interior_ring_n(uint32 num, String *result) const override;
|
|
int centroid_xy(double *x, double *y) const;
|
|
int centroid(String *result) const override;
|
|
bool dimension(uint32 *dim, const char **end) const override
|
|
{
|
|
*dim= 2;
|
|
*end= 0; /* No default end */
|
|
return 0;
|
|
}
|
|
int store_shapes(Gcalc_shape_transporter *trn) const override;
|
|
const Class_info *get_class_info() const override;
|
|
};
|
|
|
|
|
|
/***************************** MultiPoint *******************************/
|
|
|
|
class Gis_multi_point: public Geometry
|
|
{
|
|
// Maximum number of points in MultiPoint that can fit into String
|
|
static const uint32 max_n_points=
|
|
(uint32) (UINT_MAX32 - WKB_HEADER_SIZE - 4 /* n_points */) /
|
|
(WKB_HEADER_SIZE + POINT_DATA_SIZE);
|
|
public:
|
|
Gis_multi_point() = default; /* Remove gcc warning */
|
|
virtual ~Gis_multi_point() = default; /* Remove gcc warning */
|
|
uint32 get_data_size() const override;
|
|
bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
|
|
uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
|
|
uint init_from_opresult(String *bin, const char *opres, uint res_len) override;
|
|
bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
|
|
bool get_data_as_wkt(String *txt, const char **end) const override;
|
|
bool get_data_as_json(String *txt, uint max_dec_digits,
|
|
const char **end) const override;
|
|
bool get_mbr(MBR *mbr, const char **end) const override;
|
|
int num_geometries(uint32 *num) const override;
|
|
int geometry_n(uint32 num, String *result) const override;
|
|
bool dimension(uint32 *dim, const char **end) const override
|
|
{
|
|
*dim= 0;
|
|
*end= 0; /* No default end */
|
|
return 0;
|
|
}
|
|
int store_shapes(Gcalc_shape_transporter *trn) const override;
|
|
const Class_info *get_class_info() const override;
|
|
int spherical_distance_multipoints(Geometry *g, const double r, double *res,
|
|
int *error);
|
|
};
|
|
|
|
|
|
/***************************** MultiLineString *******************************/
|
|
|
|
class Gis_multi_line_string: public Geometry
|
|
{
|
|
public:
|
|
Gis_multi_line_string() = default; /* Remove gcc warning */
|
|
virtual ~Gis_multi_line_string() = default; /* Remove gcc warning */
|
|
uint32 get_data_size() const override;
|
|
bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
|
|
uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
|
|
uint init_from_opresult(String *bin, const char *opres, uint res_len) override;
|
|
bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
|
|
bool get_data_as_wkt(String *txt, const char **end) const override;
|
|
bool get_data_as_json(String *txt, uint max_dec_digits,
|
|
const char **end) const override;
|
|
bool get_mbr(MBR *mbr, const char **end) const override;
|
|
int num_geometries(uint32 *num) const override;
|
|
int geometry_n(uint32 num, String *result) const override;
|
|
int geom_length(double *len, const char **end) const override;
|
|
int is_closed(int *closed) const override;
|
|
bool dimension(uint32 *dim, const char **end) const override
|
|
{
|
|
*dim= 1;
|
|
*end= 0; /* No default end */
|
|
return 0;
|
|
}
|
|
int store_shapes(Gcalc_shape_transporter *trn) const override;
|
|
const Class_info *get_class_info() const override;
|
|
};
|
|
|
|
|
|
/***************************** MultiPolygon *******************************/
|
|
|
|
class Gis_multi_polygon: public Geometry
|
|
{
|
|
public:
|
|
Gis_multi_polygon() = default; /* Remove gcc warning */
|
|
virtual ~Gis_multi_polygon() = default; /* Remove gcc warning */
|
|
uint32 get_data_size() const override;
|
|
bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
|
|
uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
|
|
bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
|
|
bool get_data_as_wkt(String *txt, const char **end) const override;
|
|
bool get_data_as_json(String *txt, uint max_dec_digits,
|
|
const char **end) const override;
|
|
bool get_mbr(MBR *mbr, const char **end) const override;
|
|
int num_geometries(uint32 *num) const override;
|
|
int geometry_n(uint32 num, String *result) const override;
|
|
int area(double *ar, const char **end) const override;
|
|
int centroid(String *result) const override;
|
|
bool dimension(uint32 *dim, const char **end) const override
|
|
{
|
|
*dim= 2;
|
|
*end= 0; /* No default end */
|
|
return 0;
|
|
}
|
|
int store_shapes(Gcalc_shape_transporter *trn) const override;
|
|
const Class_info *get_class_info() const override;
|
|
uint init_from_opresult(String *bin, const char *opres, uint res_len) override;
|
|
};
|
|
|
|
|
|
/*********************** GeometryCollection *******************************/
|
|
|
|
class Gis_geometry_collection: public Geometry
|
|
{
|
|
public:
|
|
Gis_geometry_collection() = default; /* Remove gcc warning */
|
|
virtual ~Gis_geometry_collection() = default; /* Remove gcc warning */
|
|
uint32 get_data_size() const override;
|
|
bool init_from_wkt(Gis_read_stream *trs, String *wkb) override;
|
|
uint init_from_wkb(const char *wkb, uint len, wkbByteOrder bo, String *res) override;
|
|
uint init_from_opresult(String *bin, const char *opres, uint res_len) override;
|
|
bool init_from_json(json_engine_t *je, bool er_on_3D, String *wkb) override;
|
|
bool get_data_as_wkt(String *txt, const char **end) const override;
|
|
bool get_data_as_json(String *txt, uint max_dec_digits,
|
|
const char **end) const override;
|
|
bool get_mbr(MBR *mbr, const char **end) const override;
|
|
int area(double *ar, const char **end) const override;
|
|
int geom_length(double *len, const char **end) const override;
|
|
int num_geometries(uint32 *num) const override;
|
|
int geometry_n(uint32 num, String *result) const override;
|
|
bool dimension(uint32 *dim, const char **end) const override;
|
|
int store_shapes(Gcalc_shape_transporter *trn) const override;
|
|
const Class_info *get_class_info() const override;
|
|
};
|
|
|
|
struct Geometry_buffer : public
|
|
my_aligned_storage<sizeof(Gis_point), MY_ALIGNOF(Gis_point)> {};
|
|
|
|
#endif /* SPATIAL_INCLUDED */
|