mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
83a4fcac5c
myisam/rt_index.c: Should call find_first() instead of find_next() after key deletion. Fixed type cast. myisam/sp_key.c: Fixed spatial key creation. sql/field.cc: To get rid of warning.
286 lines
6.8 KiB
C
286 lines
6.8 KiB
C
/* Copyright (C) 2000 MySQL AB & Ramil Kalimullin
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
#include "myisamdef.h"
|
|
#include "sp_defs.h"
|
|
|
|
static int sp_add_point_to_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr);
|
|
static int sp_get_point_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr);
|
|
static int sp_get_linestring_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr);
|
|
static int sp_get_polygon_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr);
|
|
static int sp_get_geometry_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
double *mbr, int top);
|
|
static int sp_mbr_from_wkb(uchar (*wkb), uint size, uint n_dims, double *mbr);
|
|
|
|
|
|
uint sp_make_key(register MI_INFO *info, uint keynr, uchar *key,
|
|
const byte *record, my_off_t filepos)
|
|
{
|
|
HA_KEYSEG *keyseg;
|
|
MI_KEYDEF *keyinfo = &info->s->keyinfo[keynr];
|
|
uint len = 0;
|
|
byte *pos;
|
|
uint dlen;
|
|
uchar *dptr;
|
|
double mbr[SPDIMS * 2];
|
|
uint i;
|
|
|
|
keyseg = &keyinfo->seg[-1];
|
|
pos = (byte*)record + keyseg->start;
|
|
|
|
dlen = _mi_calc_blob_length(keyseg->bit_start, pos);
|
|
memcpy_fixed(&dptr, pos + keyseg->bit_start, sizeof(char*));
|
|
sp_mbr_from_wkb(dptr + 4, dlen - 4, SPDIMS, mbr); /* SRID */
|
|
|
|
for (i = 0, keyseg = keyinfo->seg; keyseg->type; keyseg++, i++)
|
|
{
|
|
uint length = keyseg->length;
|
|
|
|
pos = ((byte*)mbr) + keyseg->start;
|
|
if (keyseg->flag & HA_SWAP_KEY)
|
|
{
|
|
#ifdef HAVE_ISNAN
|
|
if (keyseg->type == HA_KEYTYPE_FLOAT)
|
|
{
|
|
float nr;
|
|
float4get(nr, pos);
|
|
if (isnan(nr))
|
|
{
|
|
/* Replace NAN with zero */
|
|
bzero(key, length);
|
|
key+= length;
|
|
continue;
|
|
}
|
|
}
|
|
else if (keyseg->type == HA_KEYTYPE_DOUBLE)
|
|
{
|
|
double nr;
|
|
float8get(nr, pos);
|
|
if (isnan(nr))
|
|
{
|
|
bzero(key, length);
|
|
key+= length;
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
pos += length;
|
|
while (length--)
|
|
{
|
|
*key++ = *--pos;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
memcpy((byte*)key, pos, length);
|
|
key += keyseg->length;
|
|
}
|
|
len += keyseg->length;
|
|
}
|
|
_mi_dpointer(info, key, filepos);
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
Calculate minimal bounding rectangle (mbr) of the spatial object
|
|
stored in "well-known binary representation" (wkb) format.
|
|
*/
|
|
static int sp_mbr_from_wkb(uchar *wkb, uint size, uint n_dims, double *mbr)
|
|
{
|
|
uint i;
|
|
|
|
for (i=0; i < n_dims; ++i)
|
|
{
|
|
mbr[i * 2] = DBL_MAX;
|
|
mbr[i * 2 + 1] = -DBL_MAX;
|
|
}
|
|
|
|
return sp_get_geometry_mbr(&wkb, wkb + size, n_dims, mbr, 1);
|
|
}
|
|
|
|
/*
|
|
Add one point stored in wkb to mbr
|
|
*/
|
|
|
|
static int sp_add_point_to_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order __attribute__((unused)),
|
|
double *mbr)
|
|
{
|
|
double ord;
|
|
double *mbr_end= mbr + n_dims * 2;
|
|
|
|
while (mbr < mbr_end)
|
|
{
|
|
if ((*wkb) > end - 8)
|
|
return -1;
|
|
float8get(ord, (*wkb));
|
|
(*wkb)+= 8;
|
|
if (ord < *mbr)
|
|
float8store((char*) mbr, ord);
|
|
mbr++;
|
|
if (ord > *mbr)
|
|
float8store((char*) mbr, ord);
|
|
mbr++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int sp_get_point_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr)
|
|
{
|
|
return sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr);
|
|
}
|
|
|
|
|
|
static int sp_get_linestring_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr)
|
|
{
|
|
uint n_points;
|
|
|
|
n_points = uint4korr(*wkb);
|
|
(*wkb) += 4;
|
|
for (; n_points > 0; --n_points)
|
|
{
|
|
/* Add next point to mbr */
|
|
if (sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr))
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int sp_get_polygon_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
uchar byte_order, double *mbr)
|
|
{
|
|
uint n_linear_rings;
|
|
uint n_points;
|
|
|
|
n_linear_rings = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
|
|
for (; n_linear_rings > 0; --n_linear_rings)
|
|
{
|
|
n_points = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
for (; n_points > 0; --n_points)
|
|
{
|
|
/* Add next point to mbr */
|
|
if (sp_add_point_to_mbr(wkb, end, n_dims, byte_order, mbr))
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int sp_get_geometry_mbr(uchar *(*wkb), uchar *end, uint n_dims,
|
|
double *mbr, int top)
|
|
{
|
|
int res;
|
|
uchar byte_order;
|
|
uint wkb_type;
|
|
|
|
byte_order = *(*wkb);
|
|
++(*wkb);
|
|
|
|
wkb_type = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
|
|
switch ((enum wkbType) wkb_type)
|
|
{
|
|
case wkbPoint:
|
|
res = sp_get_point_mbr(wkb, end, n_dims, byte_order, mbr);
|
|
break;
|
|
case wkbLineString:
|
|
res = sp_get_linestring_mbr(wkb, end, n_dims, byte_order, mbr);
|
|
break;
|
|
case wkbPolygon:
|
|
res = sp_get_polygon_mbr(wkb, end, n_dims, byte_order, mbr);
|
|
break;
|
|
case wkbMultiPoint:
|
|
{
|
|
uint n_items;
|
|
n_items = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
for (; n_items > 0; --n_items)
|
|
{
|
|
byte_order = *(*wkb);
|
|
++(*wkb);
|
|
(*wkb) += 4;
|
|
if (sp_get_point_mbr(wkb, end, n_dims, byte_order, mbr))
|
|
return -1;
|
|
}
|
|
res = 0;
|
|
break;
|
|
}
|
|
case wkbMultiLineString:
|
|
{
|
|
uint n_items;
|
|
n_items = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
for (; n_items > 0; --n_items)
|
|
{
|
|
byte_order = *(*wkb);
|
|
++(*wkb);
|
|
(*wkb) += 4;
|
|
if (sp_get_linestring_mbr(wkb, end, n_dims, byte_order, mbr))
|
|
return -1;
|
|
}
|
|
res = 0;
|
|
break;
|
|
}
|
|
case wkbMultiPolygon:
|
|
{
|
|
uint n_items;
|
|
n_items = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
for (; n_items > 0; --n_items)
|
|
{
|
|
byte_order = *(*wkb);
|
|
++(*wkb);
|
|
(*wkb) += 4;
|
|
if (sp_get_polygon_mbr(wkb, end, n_dims, byte_order, mbr))
|
|
return -1;
|
|
}
|
|
res = 0;
|
|
break;
|
|
}
|
|
case wkbGeometryCollection:
|
|
{
|
|
uint n_items;
|
|
|
|
if (!top)
|
|
return -1;
|
|
|
|
n_items = uint4korr((*wkb));
|
|
(*wkb) += 4;
|
|
for (; n_items > 0; --n_items)
|
|
{
|
|
if (sp_get_geometry_mbr(wkb, end, n_dims, mbr, 0))
|
|
return -1;
|
|
}
|
|
res = 0;
|
|
break;
|
|
}
|
|
default:
|
|
res = -1;
|
|
}
|
|
return res;
|
|
}
|