about summary refs log tree commit diff homepage
path: root/torus.h
blob: 4c6299035f39e62901e07b982b87123e402d84c5 (plain) (blame)
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/* Copyright (C) 2017  C. 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 <stdalign.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#include <wchar.h>

#define ARRAY_LEN(a) (sizeof(a) / sizeof((a)[0]))

static const char DefaultDataPath[] = "torus.dat";
static const char DefaultSockPath[] = "torus.sock";
static const char DefaultFontPath[] = "default8x16.psfu";

enum {
	ColorBlack,
	ColorRed,
	ColorGreen,
	ColorYellow,
	ColorBlue,
	ColorMagenta,
	ColorCyan,
	ColorWhite,
	ColorBright,
};

static const wchar_t CP437[256] = (
	L" ☺☻♥♦♣♠•◘○◙♂♀♪♫☼"
	L"►◄↕‼¶§▬↨↑↓→←∟↔▲▼"
	L" !\"#$%&'()*+,-./"
	L"0123456789:;<=>?"
	L"@ABCDEFGHIJKLMNO"
	L"PQRSTUVWXYZ[\\]^_"
	L"`abcdefghijklmno"
	L"pqrstuvwxyz{|}~⌂"
	L"ÇüéâäàåçêëèïîìÄÅ"
	L"ÉæÆôöòûùÿÖÜ¢£¥₧ƒ"
	L"áíóúñѪº¿⌐¬½¼¡«»"
	L"░▒▓│┤╡╢╖╕╣║╗╝╜╛┐"
	L"└┴┬├─┼╞╟╚╔╩╦╠═╬╧"
	L"╨╤╥╙╘╒╓╫╪┘┌█▄▌▐▀"
	L"αßΓπΣσµτΦΘΩδ∞φε∩"
	L"≡±≥≤⌠⌡÷≈°∙·√ⁿ²■ "
);

enum {
	CellRows = 25,
	CellCols = 80,
};
static const size_t CellsSize = sizeof(uint8_t[CellRows][CellCols]);

static const uint8_t CellInitX = CellCols / 2;
static const uint8_t CellInitY = CellRows / 2;

struct Meta {
	time_t createTime;
	time_t modifyTime;
	time_t accessTime;
	uint32_t modifyCount;
	uint32_t accessCount;
};

struct Tile {
	alignas(4096)
	time_t createTime;
	time_t modifyTime;
	alignas(16) uint8_t cells[CellRows][CellCols];
	alignas(16) uint8_t colors[CellRows][CellCols];
	uint32_t modifyCount;
	uint32_t accessCount;
	time_t accessTime;
};
static_assert(4096 == sizeof(struct Tile), "struct Tile is page-sized");

static inline struct Meta tileMeta(const struct Tile *tile) {
	return (struct Meta) {
		.createTime = tile->createTime,
		.modifyTime = tile->modifyTime,
		.accessTime = tile->accessTime,
		.modifyCount = tile->modifyCount,
		.accessCount = tile->accessCount,
	};
}

enum {
	TileRows = 512,
	TileCols = 512,
};
static const size_t TilesSize = sizeof(struct Tile[TileRows][TileCols]);

static const uint32_t TileInitX = 0;
static const uint32_t TileInitY = 0;

static const struct {
	uint32_t tileX;
	uint32_t tileY;
} Ports[] = {
	{ TileInitX, TileInitY },
	{ TileCols * 3 / 4, TileRows * 3 / 4 }, // NW
	{ TileCols * 1 / 4, TileRows * 3 / 4 }, // NE
	{ TileCols * 1 / 4, TileRows * 1 / 4 }, // SE
	{ TileCols * 3 / 4, TileRows * 1 / 4 }, // SW
};

enum {
	MapRows = 11,
	MapCols = 11,
};

struct Map {
	time_t now;
	struct Meta min;
	struct Meta max;
	struct Meta meta[MapRows][MapCols];
};

struct ServerMessage {
	enum {
		ServerTile,
		ServerMove,
		ServerPut,
		ServerCursor,
		ServerMap,
	} type;
	union {
		struct {
			uint8_t cellX;
			uint8_t cellY;
		} move;
		struct {
			uint8_t cellX;
			uint8_t cellY;
			uint8_t color;
			uint8_t cell;
		} put;
		struct {
			uint8_t oldCellX;
			uint8_t oldCellY;
			uint8_t newCellX;
			uint8_t newCellY;
		} cursor;
	};
};

static const uint8_t CursorNone = UINT8_MAX;

struct ClientMessage {
	enum {
		ClientMove,
		ClientFlip,
		ClientPut,
		ClientMap,
		ClientTele,
	} type;
	union {
		struct {
			int8_t dx;
			int8_t dy;
		} move;
		struct {
			uint8_t color;
			uint8_t cell;
		} put;
		uint8_t port;
	};
};