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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/* Copyright (C) 2017 June McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#define PACKED __attribute__((packed))
#define ALIGNED(x) __attribute__((aligned(x)))
#define ARRAY_LEN(a) (sizeof(a) / sizeof((a)[0]))
#undef COLOR_BLACK
#undef COLOR_RED
#undef COLOR_GREEN
#undef COLOR_YELLOW
#undef COLOR_BLUE
#undef COLOR_MAGENTA
#undef COLOR_CYAN
#undef COLOR_WHITE
enum {
COLOR_BLACK,
COLOR_RED,
COLOR_GREEN,
COLOR_YELLOW,
COLOR_BLUE,
COLOR_MAGENTA,
COLOR_CYAN,
COLOR_WHITE,
COLOR_BRIGHT,
};
enum {
CELL_ROWS = 25,
CELL_COLS = 80,
};
static const size_t CELLS_SIZE = sizeof(char[CELL_ROWS][CELL_COLS]);
static const uint8_t CELL_INIT_X = CELL_COLS / 2;
static const uint8_t CELL_INIT_Y = CELL_ROWS / 2;
struct ALIGNED(4096) Tile {
time_t createTime;
time_t modifyTime;
char ALIGNED(16) cells[CELL_ROWS][CELL_COLS];
uint8_t ALIGNED(16) colors[CELL_ROWS][CELL_COLS];
uint32_t modifyCount;
uint32_t accessCount;
time_t accessTime;
};
static_assert(4096 == sizeof(struct Tile), "struct Tile is page-sized");
static_assert(16 == offsetof(struct Tile, cells), "stable cells offset");
static_assert(2016 == offsetof(struct Tile, colors), "stable colors offset");
enum {
TILE_ROWS = 512,
TILE_COLS = 512,
};
static const size_t TILES_SIZE = sizeof(struct Tile[TILE_ROWS][TILE_COLS]);
static const uint32_t TILE_VOID_X = UINT32_MAX;
static const uint32_t TILE_VOID_Y = UINT32_MAX;
static const struct {
uint32_t tileX;
uint32_t tileY;
} SPAWNS[] = {
{ 0, 0 },
{ TILE_COLS * 3 / 4, TILE_ROWS * 3 / 4 }, // NW
{ TILE_COLS * 1 / 4, TILE_ROWS * 3 / 4 }, // NE
{ TILE_COLS * 1 / 4, TILE_ROWS * 1 / 4 }, // SE
{ TILE_COLS * 3 / 4, TILE_ROWS * 1 / 4 }, // SW
};
enum {
MAP_ROWS = 11,
MAP_COLS = 11,
};
struct Map {
struct MapTile {
time_t createTime;
time_t modifyTime;
time_t accessTime;
uint32_t modifyCount;
uint32_t accessCount;
} tiles[MAP_ROWS][MAP_COLS];
};
struct ServerMessage {
enum PACKED {
SERVER_TILE,
SERVER_MOVE,
SERVER_PUT,
SERVER_CURSOR,
SERVER_MAP,
} type;
union {
struct {
uint8_t cellX;
uint8_t cellY;
} move;
struct {
uint8_t cellX;
uint8_t cellY;
uint8_t color;
char cell;
} put;
struct {
uint8_t oldCellX;
uint8_t oldCellY;
uint8_t newCellX;
uint8_t newCellY;
} cursor;
};
};
static const uint8_t CURSOR_NONE = UINT8_MAX;
struct ClientMessage {
enum PACKED {
CLIENT_MOVE,
CLIENT_PUT,
CLIENT_SPAWN,
CLIENT_MAP,
} type;
union {
struct {
int8_t dx;
int8_t dy;
} move;
struct {
uint8_t color;
char cell;
} put;
uint8_t spawn;
};
};
|