1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
*
* PostGIS 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.
*
* PostGIS 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 PostGIS. If not, see <http://www.gnu.org/licenses/>.
*
**********************************************************************
*
* Copyright 2013 Nicklas Avén
*
**********************************************************************/
/**********************************************************************
*
* PostGIS - Spatial Types for PostgreSQL
* http://postgis.net
* Copyright 2013 Nicklas Avén
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU General Public Licence. See the COPYING file.
*
**********************************************************************/
#include "liblwgeom_internal.h"
#include "lwgeom_log.h"
#include <limits.h>
#include "bytebuffer.h"
/* Maximum number of geometry dimmensions that internal arrays can hold */
#define MAX_N_DIMS 4
#define MAX_BBOX_SIZE 64
#define MAX_SIZE_SIZE 8
/**
* Header true/false flags
*/
#define FIRST_BYTE_SET_BBOXES(flag, bool) ((flag) = ((bool) ? (flag) | 0x01 : (flag) & (~0x01)))
#define FIRST_BYTE_SET_SIZES(flag, bool) ((flag) = ((bool) ? (flag) | 0x02 : (flag) & (~0x02)))
#define FIRST_BYTE_SET_IDLIST(flag, bool) ((flag) = ((bool) ? (flag) | 0x04 : (flag) & (~0x04)))
#define FIRST_BYTE_SET_EXTENDED(flag, bool) ((flag) = ((bool) ? (flag) | 0x08 : (flag) & (~0x08)))
#define FIRST_BYTE_SET_EMPTY(flag, bool) ((flag) = ((bool) ? (flag) | 0x10 : (flag) & (~0x10)))
/**
* Macros for manipulating the 'type_precision' int. An int8_t used as follows:
* Type 4 bits
* Precision 4 bits
*/
#define TYPE_PREC_SET_TYPE(flag, type) ((flag) = ((flag) & 0xF0) | (((type) & 0x0F)))
#define TYPE_PREC_SET_PREC(flag, prec) ((flag) = ((flag) & 0x0F) | (((prec) & 0x0F) << 4))
#define HIGHER_DIM_SET_HASZ(flag, bool) ((flag) = ((bool) ? (flag) | 0x01 : (flag) & (~0x01)))
#define HIGHER_DIM_SET_HASM(flag, bool) ((flag) = ((bool) ? (flag) | 0x02 : (flag) & (~0x02)))
#define HIGHER_DIM_SET_PRECZ(flag, prec) ((flag) = ((flag) & 0xE3) | (((prec) & 0x07) << 2))
#define HIGHER_DIM_SET_PRECM(flag, prec) ((flag) = ((flag) & 0x1F) | (((prec) & 0x07) << 5))
typedef struct
{
/* Options defined at start */
uint8_t variant;
int8_t prec_xy;
int8_t prec_z;
int8_t prec_m;
float factor[4]; /*What factor to multiply the coordiinates with to get the requested precision*/
} TWKB_GLOBALS;
typedef struct
{
uint8_t variant; /*options that change at runtime*/
bytebuffer_t *header_buf;
bytebuffer_t *geom_buf;
int hasz;
int hasm;
const int64_t *idlist;
int64_t bbox_min[MAX_N_DIMS];
int64_t bbox_max[MAX_N_DIMS];
int64_t accum_rels[MAX_N_DIMS]; /*Holds the acculmulated relative values*/
} TWKB_STATE;
static int lwgeom_to_twkb_buf(const LWGEOM *geom, TWKB_GLOBALS *global_values, TWKB_STATE *ts);
static int lwpoint_to_twkb_buf(const LWPOINT *line, TWKB_GLOBALS *global_values, TWKB_STATE *ts);
static int lwline_to_twkb_buf(const LWLINE *line, TWKB_GLOBALS *global_values, TWKB_STATE *ts);
static int lwpoly_to_twkb_buf(const LWPOLY *poly, TWKB_GLOBALS *global_values, TWKB_STATE *ts);
static int lwcollection_to_twkb_buf(const LWCOLLECTION *col, TWKB_GLOBALS *global_values, TWKB_STATE *ts);
static int lwgeom_write_to_buffer(const LWGEOM *geom, TWKB_GLOBALS *global_values, TWKB_STATE *parent_state);
|
