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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ 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; version 2 of the License. │
│ │
│ 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., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "dsp/core/gamma.h"
#include "dsp/scale/scale.h"
#include "libc/bits/bits.h"
#include "libc/bits/popcnt.h"
#include "libc/bits/safemacros.internal.h"
#include "libc/bits/xchg.h"
#include "libc/calls/calls.h"
#include "libc/calls/ioctl.h"
#include "libc/calls/struct/stat.h"
#include "libc/calls/struct/termios.h"
#include "libc/calls/struct/winsize.h"
#include "libc/calls/termios.internal.h"
#include "libc/conv/conv.h"
#include "libc/conv/itoa.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/fmt/fmt.h"
#include "libc/log/check.h"
#include "libc/log/log.h"
#include "libc/macros.h"
#include "libc/mem/mem.h"
#include "libc/nexgen32e/nt2sysv.h"
#include "libc/nt/comdlg.h"
#include "libc/nt/dll.h"
#include "libc/nt/enum/bitblt.h"
#include "libc/nt/enum/color.h"
#include "libc/nt/enum/cs.h"
#include "libc/nt/enum/cw.h"
#include "libc/nt/enum/ht.h"
#include "libc/nt/enum/idc.h"
#include "libc/nt/enum/mb.h"
#include "libc/nt/enum/mf.h"
#include "libc/nt/enum/mk.h"
#include "libc/nt/enum/ofn.h"
#include "libc/nt/enum/rdw.h"
#include "libc/nt/enum/sc.h"
#include "libc/nt/enum/size.h"
#include "libc/nt/enum/sw.h"
#include "libc/nt/enum/tpm.h"
#include "libc/nt/enum/vk.h"
#include "libc/nt/enum/wm.h"
#include "libc/nt/enum/ws.h"
#include "libc/nt/events.h"
#include "libc/nt/messagebox.h"
#include "libc/nt/paint.h"
#include "libc/nt/struct/msg.h"
#include "libc/nt/struct/openfilename.h"
#include "libc/nt/struct/paintstruct.h"
#include "libc/nt/struct/windowplacement.h"
#include "libc/nt/struct/wndclass.h"
#include "libc/nt/windows.h"
#include "libc/rand/rand.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/str/tpenc.h"
#include "libc/sysv/consts/ex.h"
#include "libc/sysv/consts/exit.h"
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/poll.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/termios.h"
#include "libc/time/time.h"
#include "libc/unicode/unicode.h"
#include "libc/x/x.h"
#include "third_party/getopt/getopt.h"
/**
* @fileoverview Conway's Game of Life
*
* The Game of Life, also known simply as Life, is a cellular automaton
* devised by the British mathematician John Horton Conway in 1970. It
* is Turing complete and can simulate a universal constructor or any
* other Turing machine.
*
* There's about 20 million Software Engineers in the world, which means
* Game of Life has likely been implemented 20 million times before. Why
* do we need this one?
*
* - It's a tutorial on how to build an Actually Portable Executable
* that'll run as a GUI on Windows, and as a TUI on Linux/Mac/BSDs
* using roughly one thousand lines of code. For a much better GUI
* that's not as hackable, try Golly: http://golly.sourceforge.net
*
* - It's a tutorial on how to implement XTERM mouse cursor dragging
* where zooming in/out can be performed too using ctrl+mousewheel
* which is an underused (but easily implemented) terminal feature
* that even the Windows10 Command Prompt supports these days.
*
* - It uses bitboards. That's almost as simple as the naive approach
* but goes significantly faster, needing 150 picoseconds per board
* position. See "Bitboard Methods for Games" by Cameron Browne for
* further details on how it works. More advanced algorithms exist,
* such as Hashlife: quadtree memoization to make humongous numbers
* of generations tractable.
*
* Here's how you can compile this program on Linux:
*
* git clone https://github.com/jart/cosmopolitan && cd cosmopolitan
* make -j12 o//tool/viz/life.com
*
* The output binary works on Linux, Windows, Mac, and FreeBSD:
*
* o//tool/viz/life.com
*
* @see https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life
* @see https://www.conwaylife.com/wiki/Run_Length_Encoded
* @see http://golly.sourceforge.net/
*/
#define USAGE \
" [-zNW] [-w WIDTH] [-h HEIGHT] [PATH]\n\
\n\
DESCRIPTION\n\
\n\
Conway's Game of Life\n\
\n\
FLAGS\n\
\n\
-? help\n\
-z zoom\n\
-w INT board width\n\
-h INT board height\n\
-N natural scrolling\n\
-W white terminal background\n\
\n\
SHORTCUTS\n\
\n\
space step\n\
left+drag draw\n\
right+drag move\n\
ctrl+wheel zoom\n\
ctrl+t turbo\n\
alt+t slowmo\n\
R reset\n\
q quit\n\
\n"
#define MAXZOOM 14
#define VOIDSPACE "."
#define ALT (1 << 29)
#define INTERRUPTED 1
#define RESIZED 2
#define IDM_ABOUT 0x10
#define IDM_OPEN 0x20
#define MOUSE_LEFT_DOWN 0
#define MOUSE_MIDDLE_DOWN 1
#define MOUSE_RIGHT_DOWN 2
#define MOUSE_LEFT_UP 4
#define MOUSE_MIDDLE_UP 5
#define MOUSE_RIGHT_UP 6
#define MOUSE_LEFT_DRAG 32
#define MOUSE_MIDDLE_DRAG 33
#define MOUSE_RIGHT_DRAG 34
#define MOUSE_WHEEL_UP 64
#define MOUSE_WHEEL_DOWN 65
#define MOUSE_CTRL_WHEEL_UP 80
#define MOUSE_CTRL_WHEEL_DOWN 81
struct Buffer {
unsigned i, n;
char *p;
};
static bool erase;
static bool white;
static bool natural;
static bool mousemode;
static bool isdragging;
static bool dimensioned;
static int out;
static int line;
static int column;
static int action;
static int color[2];
static long top;
static long bottom;
static long left;
static long right;
static long tyn;
static long txn;
static long byn;
static long bxn;
static long zoom;
static long speed;
static long save_y;
static long save_x;
static long save_top;
static long save_left;
static long generation;
static uint64_t *board;
static uint64_t *board2;
static size_t boardsize;
static int64_t oldcursor;
static struct Buffer buffer;
static struct termios oldterm;
static char name[64];
static char statusline[256];
static char16_t statusline16[256];
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » algorithm ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
#define LEFT 0x0101010101010101ul
#define RIGHT 0x8080808080808080ul
#define TOP 0x00000000000000FFul
#define BOTTOM 0xFF00000000000000ul
#define CTRL(C) ((C) ^ 0100)
#define GOUP(x) ((x) >> 8)
#define GODOWN(x) ((x) << 8)
#define GORIGHT(x) (((x) & ~RIGHT) << 1)
#define GOLEFT(x) (((x) & ~LEFT) >> 1)
#define LEFTMOST(x) ((x)&LEFT)
#define RIGHTMOST(x) ((x)&RIGHT)
#define TOPMOST(x) ((x)&TOP)
#define BOTMOST(x) ((x)&BOTTOM)
#define ADD(X) \
do { \
uint64_t c1, c2; \
c1 = r0 & (X); \
c2 = r1 & c1; \
r0 ^= (X); \
r1 ^= c1; \
r2 |= c2; \
} while (0)
#define STEP(RES, B00, B01, B02, B10, B11, B12, B20, B21, B22) \
do { \
uint64_t r0 = 0, r1 = 0, r2 = 0; \
ADD(GORIGHT(GODOWN(B11)) | GORIGHT(BOTMOST(B01) >> 56) | \
GODOWN(RIGHTMOST(B10) >> 7) | BOTMOST(RIGHTMOST(B00)) >> 7 >> 56); \
ADD(GORIGHT(B11) | RIGHTMOST(B10) >> 7); \
ADD(GORIGHT(GOUP(B11)) | GORIGHT(TOPMOST(B21) << 56) | \
GOUP(RIGHTMOST(B10) >> 7) | TOPMOST(RIGHTMOST(B20)) >> 7 << 56); \
ADD(GODOWN(B11) | BOTMOST(B01) >> 56); \
ADD(GOUP(B11) | TOPMOST(B21) << 56); \
ADD(GOLEFT(GODOWN(B11)) | GOLEFT(BOTMOST(B01) >> 56) | \
GODOWN(LEFTMOST(B12) << 7) | BOTMOST(LEFTMOST(B02)) << 7 >> 56); \
ADD(GOLEFT(B11) | LEFTMOST(B12) << 7); \
ADD(GOLEFT(GOUP(B11)) | GOLEFT(TOPMOST(B21) << 56) | \
GOUP(LEFTMOST(B12) << 7) | TOPMOST(LEFTMOST(B22)) << 7 << 56); \
RES = (B11 | r0) & r1 & ~r2; \
} while (0)
static void Step(void) {
long y, x, yn, xn;
yn = byn >> 3;
xn = bxn >> 3;
for (y = 0; y < yn; ++y) {
for (x = 0; x < xn; ++x) {
STEP(board2[y * xn + x],
board[(y ? y - 1 : yn - 1) * xn + (x ? x - 1 : xn - 1)],
board[(y ? y - 1 : yn - 1) * xn + x],
board[(y ? y - 1 : yn - 1) * xn + (x + 1 < xn ? x + 1 : 0)],
board[y * xn + (x ? x - 1 : xn - 1)], board[y * xn + x],
board[y * xn + (x + 1 < xn ? x + 1 : 0)],
board[(y + 1 < yn ? y + 1 : 0) * xn + (x ? x - 1 : xn - 1)],
board[(y + 1 < yn ? y + 1 : 0) * xn + x],
board[(y + 1 < yn ? y + 1 : 0) * xn + (x + 1 < xn ? x + 1 : 0)]);
}
}
xchg(&board, &board2);
++generation;
}
static bool Test(long y, long x) {
return (board[(bxn >> 3) * (y >> 3) + (x >> 3)] >>
(((y & 7) << 3) + (x & 7))) &
1;
}
static void Set(long y, long x) {
board[(bxn >> 3) * (y >> 3) + (x >> 3)] |= 1ul << (((y & 7) << 3) + (x & 7));
}
static void Unset(long y, long x) {
board[(bxn >> 3) * (y >> 3) + (x >> 3)] &=
~(1ul << (((y & 7) << 3) + (x & 7)));
}
static long Population(void) {
long i, n, p;
n = (byn * bxn) >> 6;
for (p = i = 0; i < n; ++i) {
p += popcnt(board[i]);
}
return p;
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » buffer ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
static void AppendData(char *data, unsigned len) {
char *p;
unsigned n;
if (buffer.i + len + 1 > buffer.n) {
n = MAX(buffer.i + len + 1, MAX(16, buffer.n + (buffer.n >> 1)));
if (!(p = realloc(buffer.p, n))) return;
buffer.p = p;
buffer.n = n;
}
memcpy(buffer.p + buffer.i, data, len);
buffer.p[buffer.i += len] = 0;
}
static void AppendChar(char c) {
AppendData(&c, 1);
}
#define AppendStr(s) AppendData(s, strlen(s))
static void AppendInt(long x) {
char ibuf[21];
AppendData(ibuf, int64toarray_radix10(x, ibuf));
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » board control ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
static void Generation(void) {
long i;
for (i = 0; i < speed; ++i) {
Step();
}
}
static void Dimension(void) {
if (!dimensioned) {
top = byn / 2 - tyn / 2;
left = bxn / 2 - txn / 2;
dimensioned = true;
}
right = left + txn;
bottom = top + tyn;
}
static void Move(long dy, long dx) {
long yn, xn;
yn = zoom ? tyn * 2 : tyn;
xn = txn;
top = top + (dy << zoom);
left = left + (dx << zoom);
bottom = top + (yn << zoom);
right = left + (xn << zoom);
}
static void OnUp(void) {
Move(-1, 0);
}
static void OnDown(void) {
Move(+1, 0);
}
static void OnLeft(void) {
Move(0, -1);
}
static void OnRight(void) {
Move(0, +1);
}
static void OnPageUp(void) {
Move(-(tyn - 2), 0);
}
static void OnPageDown(void) {
Move(+(tyn - 2), 0);
}
static void OnTurbo(void) {
++speed;
}
static void OnSlowmo(void) {
--speed;
if (speed < 1) speed = 1;
}
static void SetZoom(long y, long x, int d) {
long a, b;
if ((0 <= y && y < tyn) && (0 <= x && x < txn)) {
a = zoom;
b = MIN(MAXZOOM, MAX(0, a + d));
zoom = b;
Move(((y << (a + !!a)) - (y << (b + !!b))) >> b,
((x << a) - (x << b)) >> b);
}
}
static void OnZoom(long y, long x) {
SetZoom(y, x, +1);
}
static void OnUnzoom(long y, long x) {
SetZoom(y, x, -1);
}
static void OnMouseLeftDrag(long y, long x) {
if (y == save_y && x == save_x) return;
save_y = y;
save_x = x;
y = top + (y << (zoom + !!zoom));
x = left + (x << zoom);
y += rand64() & ((1ul << (zoom + !!zoom)) - 1);
x += rand64() & ((1ul << zoom) - 1);
if (y < 0 || y >= byn) return;
if (x < 0 || x >= bxn) return;
if (erase) {
Unset(y, x);
} else {
Set(y, x);
}
}
static void OnMouseLeftUp(long y, long x) {
isdragging = false;
}
static void OnMouseLeftDown(long y, long x) {
isdragging = true;
save_y = y;
save_x = x;
y = top + (y << (zoom + !!zoom));
x = left + (x << zoom);
erase = false;
if (y < 0 || y >= byn) return;
if (x < 0 || x >= bxn) return;
if ((erase = Test(y, x))) {
Unset(y, x);
} else {
Set(y, x);
}
}
static void OnMouseRightUp(long y, long x) {
isdragging = false;
}
static void OnMouseRightDown(long y, long x) {
isdragging = true;
save_y = y;
save_x = x;
save_top = top;
save_left = left;
}
static void OnMouseRightDrag(long y, long x) {
long dy, dx, h, w;
dy = (save_y - y) << zoom;
dx = (save_x - x) << zoom;
if (zoom) dy <<= 1;
if (natural) {
dy = -dy;
dx = -dx;
}
h = bottom - top;
w = right - left;
top = save_top + dy;
left = save_left + dx;
bottom = top + h;
right = left + w;
}
static void *NewBoard(size_t *out_size) {
char *p;
size_t s, n, k;
s = (byn * bxn) >> 3;
k = PAGESIZE + ROUNDUP(s, PAGESIZE);
n = ROUNDUP(k + PAGESIZE, FRAMESIZE);
p = mmap(NULL, n, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
mprotect(p, PAGESIZE, PROT_NONE);
mprotect(p + k, n - k, PROT_NONE);
if (out_size) *out_size = n;
return p + PAGESIZE;
}
static void FreeBoard(void *p, size_t n) {
munmap((char *)p - PAGESIZE, n);
}
static void AllocateBoardsWithHardwareAcceleratedMemorySafety(void) {
if (board) {
FreeBoard(board2, boardsize);
FreeBoard(board, boardsize);
}
board = NewBoard(&boardsize);
board2 = NewBoard(NULL);
}
static void GenerateStatusLine(void) {
snprintf(statusline, sizeof(statusline),
"%s :: %,ldg %,ldp %lds %ldx %ld×%ld (%ld,%ld,%ld,%ld)", name,
generation, Population(), speed, zoom, byn, bxn, left, top, right,
bottom);
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » files ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
static void OnHeader(void) {
size_t n;
if (!buffer.i) return;
switch (buffer.p[0]) {
case 'N':
if (buffer.i > 2) {
n = MIN(buffer.i - 2, sizeof(name) - 1);
memcpy(name, buffer.p + 2, n);
name[n] = 0;
}
break;
default:
break;
}
}
static int ReadChar(FILE *f) {
int c;
++column;
if ((c = fgetc(f)) == -1) return -1;
if (c == '\n') {
++line;
column = 0;
}
return c;
}
static int GetChar(FILE *f) {
int c;
for (;;) {
if ((c = ReadChar(f)) == -1) return -1;
if (c == '#' && column == 1) {
for (;;) {
if ((c = ReadChar(f)) == -1) return -1;
if (c == '\r') {
continue;
} else if (c == '\n') {
OnHeader();
break;
}
AppendChar(c);
}
continue;
}
return c;
}
}
static int LoadFile(const char *path) {
FILE *f;
long c, y, x, i, j, n, yn, xn, yo, xo;
line = 0;
f = fopen(path, "r");
if (GetChar(f) != 'x') goto ReadError;
if (GetChar(f) != ' ') goto ReadError;
if (GetChar(f) != '=') goto ReadError;
if (GetChar(f) != ' ') goto ReadError;
xn = 0;
for (;;) {
if ((c = GetChar(f)) == -1) goto ReadError;
if (!isdigit(c)) break;
xn *= 10;
xn += c - '0';
}
do {
if ((c = GetChar(f)) == -1) goto ReadError;
} while (!isdigit(c));
yn = 0;
do {
yn *= 10;
yn += c - '0';
if ((c = GetChar(f)) == -1) goto ReadError;
} while (isdigit(c));
while (c != '\n') {
if ((c = ReadChar(f)) == -1) goto ReadError;
}
if (yn > byn || xn > bxn) goto ReadError;
xchg(&board, &board2);
memset(board, 0, (byn * bxn) >> 3);
yo = byn / 2 - yn / 2;
xo = bxn / 2 - xn / 2;
y = 0;
x = 0;
for (;;) {
if ((c = GetChar(f)) == -1) goto ReadError;
if (c == '!') {
break;
} else if (isspace(c)) {
continue;
}
if (isdigit(c)) {
n = c - '0';
for (;;) {
if ((c = GetChar(f)) == -1) goto ReadError;
if (!isdigit(c)) break;
n *= 10;
n += c - '0';
}
} else {
n = 1;
}
if (c == '$') {
if (++y == yn) y = 0;
x = 0;
} else if (c == 'b' || c == 'o') {
for (i = 0; i < n; ++i) {
if (x >= xn) {
if (++y == yn) y = 0;
x = 0;
}
if (c == 'o') {
Set(yo + y, xo + x);
}
++x;
}
} else {
goto ReadError;
}
}
fclose(f);
dimensioned = false;
return 0;
ReadError:
fclose(f);
xchg(&board, &board2);
return -1;
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » terminal user interface ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
static int Write(const char *s) {
return write(out, s, strlen(s));
}
static noreturn void PrintUsage(int rc) {
Write("SYNOPSIS\n\n ");
Write(program_invocation_name);
Write(USAGE);
exit(rc);
}
static void GetOpts(int argc, char *argv[]) {
int opt;
while ((opt = getopt(argc, argv, "?hNWzw:h:")) != -1) {
switch (opt) {
case 'w':
bxn = strtol(optarg, NULL, 0);
bxn = ROUNDUP(MAX(8, bxn), 8);
break;
case 'h':
byn = strtol(optarg, NULL, 0);
byn = ROUNDUP(MAX(8, byn), 8);
break;
case 'z':
++zoom;
break;
case 'N':
natural = true;
break;
case 'W':
white = true;
break;
case '?':
PrintUsage(EXIT_SUCCESS);
default:
PrintUsage(EX_USAGE);
}
}
}
static void HideTtyCursor(void) {
Write("\e[?25l");
}
static void ShowTtyCursor(void) {
Write("\e[?25h");
}
static void EnableMouse(void) {
mousemode = true;
Write("\e[?1000;1002;1015;1006h");
}
static void DisableMouse(void) {
mousemode = false;
Write("\e[?1000;1002;1015;1006l");
}
static void LeaveScreen(void) {
Write("\e[H\e[0m\e[J");
}
static void GetTtySize(void) {
struct winsize wsize;
wsize.ws_row = tyn + 1;
wsize.ws_col = txn;
getttysize(out, &wsize);
tyn = wsize.ws_row - 1;
txn = wsize.ws_col;
right = left + txn;
bottom = top + tyn;
}
static void EnableRaw(void) {
struct termios term;
memcpy(&term, &oldterm, sizeof(term));
term.c_cc[VMIN] = 1;
term.c_cc[VTIME] = 1;
term.c_iflag &= ~(INPCK | ISTRIP | PARMRK | INLCR | IGNCR | ICRNL | IXON);
term.c_lflag &= ~(IEXTEN | ICANON | ECHO | ECHONL);
term.c_cflag &= ~(CSIZE | PARENB);
term.c_cflag |= CS8;
term.c_iflag |= IUTF8;
ioctl(out, TCSETS, &term);
}
static void OnExit(void) {
LeaveScreen();
ShowTtyCursor();
DisableMouse();
ioctl(out, TCSETS, &oldterm);
}
static void OnSigInt(int sig, struct siginfo *sa, struct ucontext *uc) {
action |= INTERRUPTED;
}
static void OnSigWinch(int sig, struct siginfo *sa, struct ucontext *uc) {
action |= RESIZED;
}
static void OnMouse(char *p) {
int e, x, y;
e = strtol(p, &p, 10);
if (*p == ';') ++p;
x = min(txn, max(1, strtol(p, &p, 10))) - 1;
if (*p == ';') ++p;
y = min(tyn, max(1, strtol(p, &p, 10))) - 1;
e |= (*p == 'm') << 2;
switch (e) {
case MOUSE_WHEEL_UP:
if (natural) {
OnDown();
OnDown();
OnDown();
} else {
OnUp();
OnUp();
OnUp();
}
break;
case MOUSE_WHEEL_DOWN:
if (natural) {
OnUp();
OnUp();
OnUp();
} else {
OnDown();
OnDown();
OnDown();
}
break;
case MOUSE_CTRL_WHEEL_UP:
if (natural) {
OnZoom(y, x);
} else {
OnUnzoom(y, x);
}
break;
case MOUSE_CTRL_WHEEL_DOWN:
if (natural) {
OnUnzoom(y, x);
} else {
OnZoom(y, x);
}
break;
case MOUSE_RIGHT_DOWN:
OnMouseRightDown(y, x);
break;
case MOUSE_RIGHT_DRAG:
OnMouseRightDrag(y, x);
break;
case MOUSE_RIGHT_UP:
OnMouseRightUp(y, x);
break;
case MOUSE_LEFT_DOWN:
OnMouseLeftDown(y, x);
break;
case MOUSE_LEFT_DRAG:
OnMouseLeftDrag(y, x);
break;
case MOUSE_LEFT_UP:
OnMouseLeftUp(y, x);
break;
default:
break;
}
}
static void ReadKeyboard(void) {
char buf[32], *p = buf;
memset(buf, 0, sizeof(buf));
if (readansi(0, buf, sizeof(buf)) == -1) {
if (errno == EINTR) return;
exit(errno);
}
switch (*p++) {
case 'q':
exit(0);
case ' ':
case 's':
case '\t':
Generation();
break;
case 'k':
case CTRL('P'):
OnUp();
break;
case 'j':
case CTRL('N'):
OnDown();
break;
case CTRL('V'):
OnPageDown();
break;
case 'M':
if (mousemode) {
DisableMouse();
} else {
EnableMouse();
}
break;
case 'R':
memset(board, 0, (byn * bxn) >> 3);
break;
case CTRL('T'):
OnTurbo();
break;
case '\e':
switch (*p++) {
case 'v':
OnPageUp();
break;
case 't':
OnSlowmo();
break;
case '[':
switch (*p++) {
case '<':
OnMouse(p);
break;
case 'A':
OnUp();
break;
case 'B':
OnDown();
break;
case 'D':
OnLeft();
break;
case 'C':
OnRight();
break;
case '5':
switch (*p++) {
case '~':
OnPageUp();
break;
default:
break;
}
break;
case '6':
switch (*p++) {
case '~':
OnPageDown();
break;
default:
break;
}
break;
default:
break;
}
break;
default:
break;
}
break;
default:
break;
}
}
static int InvertXtermGreyscale(int x) {
return -(x - 232) + 255;
}
static int ByteToColor(int x) {
uint8_t c;
c = x / 256. * 24 + 232;
if (white) c = InvertXtermGreyscale(c);
return c;
}
static void SetColor(int x, bool isbg) {
if (x != color[isbg]) {
AppendStr("\e[");
AppendInt(38 + 10 * isbg);
AppendStr(";5;");
AppendInt(x);
AppendStr("m");
color[isbg] = x;
}
}
static void SetFg(int x) {
SetColor(x, false);
}
static void SetBg(int x) {
SetColor(x, true);
}
static void BitsToBytes(uint8_t a[8], uint64_t x) {
a[0] = -((x >> 0) & 1);
a[1] = -((x >> 1) & 1);
a[2] = -((x >> 2) & 1);
a[3] = -((x >> 3) & 1);
a[4] = -((x >> 4) & 1);
a[5] = -((x >> 5) & 1);
a[6] = -((x >> 6) & 1);
a[7] = -((x >> 7) & 1);
}
static void Raster(void) {
long y, x;
SetBg(ByteToColor(0));
SetFg(ByteToColor(255));
for (y = top; y < bottom; ++y) {
for (x = left; x < right; ++x) {
if ((0 <= y && y < byn) && (0 <= x && x < bxn)) {
if (Test(y, x)) {
AppendStr("");
} else {
AppendStr(" ");
}
} else {
AppendStr(VOIDSPACE);
}
}
}
}
static void RasterZoomed(long t, long l, long b, long r,
uint8_t p[b - t][r - l]) {
uint64_t c;
uint8_t b1, b2;
long i, y, x, yn, xn;
for (y = MAX(0, t); y < MIN(b, byn); y += 8) {
for (x = MAX(0, l); x < MIN(r, bxn); x += 8) {
c = board[(bxn >> 3) * (y >> 3) + (x >> 3)];
for (i = 0; i < 8; ++i) {
BitsToBytes(&p[y - t + i][x - l], c);
c >>= 8;
}
}
}
yn = b - t;
xn = r - l;
for (i = 0; i < zoom; ++i) {
Magikarp2xX(b - t, r - l, p, yn, xn);
Magikarp2xY(b - t, r - l, p, yn, xn);
yn >>= 1;
xn >>= 1;
}
for (y = top; y < bottom; y += 2ul << zoom) {
for (x = left; x < right; x += 1ul << zoom) {
if ((0 <= y && y < byn) && (0 <= x && x < bxn)) {
b1 = p[((top - t) + ((y + 0) - top)) >> zoom]
[((left - l) + (x - left)) >> zoom];
b2 = y + (1ul << zoom) < bottom
? p[((top - t) + ((y + 1) - top)) >> zoom]
[((left - l) + (x - left)) >> zoom]
: 0;
if (b1 || b2) {
SetBg(ByteToColor(b1));
SetFg(ByteToColor(b2));
AppendStr("");
} else {
SetBg(ByteToColor(0));
SetFg(ByteToColor(255));
AppendStr(" ");
}
} else {
SetBg(ByteToColor(0));
SetFg(ByteToColor(255));
AppendStr(VOIDSPACE);
}
}
}
}
static void Draw(void) {
void *m;
long t, l, b, r, i, n;
buffer.i = 0;
color[0] = -1;
color[1] = -1;
AppendStr("\e[H");
if (!zoom) {
Raster();
} else {
t = ROUNDDOWN(top, 16);
l = ROUNDDOWN(left, 16);
b = ROUNDUP(bottom, 16);
r = ROUNDUP(right, 16);
if ((m = calloc((b - t) * (r - l), 1))) {
RasterZoomed(t, l, b, r, m);
free(m);
}
}
AppendStr("\e[0;7m");
GenerateStatusLine();
AppendStr(statusline);
n = txn - strwidth(statusline);
for (i = 0; i < n; ++i) {
AppendStr(" ");
}
AppendStr("\e[0m");
write(out, buffer.p, buffer.i);
}
static bool HasPendingInput(void) {
struct pollfd fds[1];
fds[0].fd = 0;
fds[0].events = POLLIN;
fds[0].revents = 0;
poll(fds, ARRAYLEN(fds), 0);
return fds[0].revents & (POLLIN | POLLERR);
}
static bool ShouldDraw(void) {
long double now, rate;
static long double next;
if (!isdragging) return true;
now = nowl();
rate = 1. / 24;
if (now > next && !HasPendingInput()) {
next = now + rate;
return true;
} else {
return false;
}
}
static void Tui(void) {
GetTtySize();
Dimension();
ioctl(out, TCGETS, &oldterm);
HideTtyCursor();
EnableRaw();
EnableMouse();
atexit(OnExit);
sigaction(SIGINT, &(struct sigaction){.sa_sigaction = OnSigInt}, NULL);
sigaction(SIGWINCH, &(struct sigaction){.sa_sigaction = OnSigWinch}, NULL);
do {
if (action & RESIZED) {
GetTtySize();
action &= ~RESIZED;
Draw();
} else if (ShouldDraw()) {
Draw();
}
ReadKeyboard();
} while (!(action & INTERRUPTED));
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » graphical user interface ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
static const char16_t kClassName[] = u"apelife";
static void OnMenuAbout(int64_t hwnd) {
MessageBox(hwnd, u"\
Apelife\r\n\
Cosmopolitan C Library\r\n\
αcτµαlly pδrταblε εxεcµταblε\r\n\
By Justine Tunney <jtunney@gmail.com>\r\n\
In memory of John Horton Conway, 1937-2020\r\n\
https://github.com/jart/cosmopolitan\r\n\
\r\n\
- Hold space to animate\r\n\
- Hold left mouse to draw cells\r\n\
- Hold right mouse to move view\r\n\
- Press t or alt+t to adjust speed",
u"Conway's Game of Life", kNtMbOk | kNtMbIconinformation);
}
static void OnMenuOpen(int64_t hwnd) {
char buf8[PATH_MAX];
char16_t buf16[PATH_MAX];
struct NtOpenFilename ofn;
memset(&ofn, 0, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hwnd;
ofn.lpstrFile = buf16;
ofn.nMaxFile = ARRAYLEN(buf16);
ofn.lpstrFilter = u"RLE Format (*.RLE;*.LIF;*.LIFE)\0"
u"*.RLE;*.LIF;*.LIFE\0"
u"All (*.*)\0"
u"*.*\0";
ofn.Flags = kNtOfnPathmustexist | kNtOfnFilemustexist | kNtOfnExplorer;
if (GetOpenFileName(&ofn)) {
tprecode16to8(buf8, sizeof(buf8), ofn.lpstrFile);
if (LoadFile(buf8) == -1) {
MessageBox(hwnd, u"Failed to open run-length encoded game file",
u"Open Failed", kNtMbOk | kNtMbIconerror);
}
RedrawWindow(hwnd, 0, 0, kNtRdwInvalidate);
}
}
static bool IsMaximized(int64_t hwnd) {
struct NtWindowPlacement wp;
wp.length = sizeof(wp);
return GetWindowPlacement(hwnd, &wp) && wp.showCmd == kNtSwMaximize;
}
static void OnWindowPaint(int64_t hwnd) {
int y, x;
int64_t mdc, mbm;
struct NtRect r, w;
struct NtPaintStruct ps;
BeginPaint(hwnd, &ps);
r.top = 0;
r.left = 0;
r.right = ps.rcPaint.right - ps.rcPaint.left;
r.bottom = ps.rcPaint.bottom - ps.rcPaint.top;
w.top = MAX(r.top, -(top + ps.rcPaint.top));
w.left = MAX(r.left, -(left + ps.rcPaint.left));
w.right = MIN(r.right, bxn - (left + ps.rcPaint.left));
w.bottom = MIN(r.bottom, byn - (top + ps.rcPaint.top));
mdc = CreateCompatibleDC(ps.hdc);
mbm = CreateCompatibleBitmap(ps.hdc, r.right, r.bottom);
SelectObject(mdc, mbm);
FillRect(mdc, &r, kNtColorInactiveborder);
FillRect(mdc, &w, kNtColorAppworkspace);
for (y = w.top; y < w.bottom; ++y) {
for (x = w.left; x < w.right; ++x) {
if (Test(top + ps.rcPaint.top + y, left + ps.rcPaint.left + x)) {
SetPixel(mdc, x, y, 0);
}
}
}
BitBlt(ps.hdc, ps.rcPaint.left, ps.rcPaint.top, r.right, r.bottom, mdc, 0, 0,
kNtSrccopy);
DeleteObject(mbm);
DeleteDC(mdc);
GenerateStatusLine();
tprecode8to16(statusline16, ARRAYLEN(statusline16), statusline);
SetWindowText(hwnd, statusline16);
EndPaint(hwnd, &ps);
}
static void OnWindowCharStep(int64_t hwnd, int64_t wParam, int64_t lParam) {
int i, repeats;
repeats = lParam & 0xFFFF;
for (i = 0; i < repeats; ++i) {
Generation();
}
RedrawWindow(hwnd, 0, 0, kNtRdwInvalidate);
}
static void OnWindowChar(int64_t hwnd, int64_t wParam, int64_t lParam) {
switch (wParam) {
case ' ':
case 's':
case '\t':
OnWindowCharStep(hwnd, wParam, lParam);
break;
case 't':
if (lParam & ALT) {
OnSlowmo();
} else {
OnTurbo();
}
break;
case '\r':
if (IsMaximized(hwnd)) {
SendMessage(hwnd, kNtWmSyscommand, kNtScRestore, 0);
} else {
SendMessage(hwnd, kNtWmSyscommand, kNtScMaximize, 0);
}
break;
default:
break;
}
}
static void OnWindowSize(int64_t lParam) {
txn = (lParam & 0x0000FFFF) >> 000;
tyn = (lParam & 0xFFFF0000) >> 020;
Dimension();
}
static void OnWindowLbuttondown(int64_t hwnd, int64_t wParam, int64_t lParam) {
int y, x;
y = (lParam & 0xFFFF0000) >> 020;
x = (lParam & 0x0000FFFF) >> 000;
SetCapture(hwnd);
OnMouseLeftDown(y, x);
RedrawWindow(hwnd, &(struct NtRect){x, y, x + 1, y + 1}, 0, kNtRdwInvalidate);
}
static void OnWindowLbuttonup(int64_t hwnd, int64_t wParam, int64_t lParam) {
int y, x;
y = (lParam & 0xFFFF0000) >> 020;
x = (lParam & 0x0000FFFF) >> 000;
OnMouseLeftUp(y, x);
ReleaseCapture();
}
static void OnWindowRbuttondown(int64_t hwnd, int64_t wParam, int64_t lParam) {
int y, x;
y = (lParam & 0xFFFF0000) >> 020;
x = (lParam & 0x0000FFFF) >> 000;
oldcursor = GetCursor();
SetCapture(hwnd);
SetCursor(LoadCursor(0, kNtIdcSizeall));
OnMouseRightDown(y, x);
RedrawWindow(hwnd, NULL, 0, kNtRdwInvalidate);
}
static void OnWindowRbuttonup(int64_t hwnd, int64_t wParam, int64_t lParam) {
int y, x;
y = (lParam & 0xFFFF0000) >> 020;
x = (lParam & 0x0000FFFF) >> 000;
OnMouseRightUp(y, x);
SetCursor(oldcursor);
ReleaseCapture();
}
static void OnWindowMousemove(int64_t hwnd, int64_t wParam, int64_t lParam) {
int y, x, by, bx;
y = (lParam & 0xFFFF0000) >> 020;
x = (lParam & 0x0000FFFF) >> 000;
if (wParam & kNtMkLbutton) {
OnMouseLeftDrag(y, x);
RedrawWindow(hwnd, &(struct NtRect){x, y, x + 1, y + 1}, 0,
kNtRdwInvalidate);
} else if (wParam & kNtMkRbutton) {
OnMouseRightDrag(y, x);
RedrawWindow(hwnd, NULL, 0, kNtRdwInvalidate);
}
}
static int64_t WindowProc(int64_t hwnd, uint32_t uMsg, uint64_t wParam,
int64_t lParam) {
switch (uMsg) {
case kNtWmDestroy:
PostQuitMessage(0);
return 0;
case kNtWmSize:
OnWindowSize(lParam);
return 0;
case kNtWmPaint:
OnWindowPaint(hwnd);
return 0;
case kNtWmChar:
OnWindowChar(hwnd, wParam, lParam);
return 0;
case kNtWmLbuttondown:
OnWindowLbuttondown(hwnd, wParam, lParam);
return 0;
case kNtWmLbuttonup:
OnWindowLbuttonup(hwnd, wParam, lParam);
return 0;
case kNtWmRbuttondown:
OnWindowRbuttondown(hwnd, wParam, lParam);
return 0;
case kNtWmRbuttonup:
OnWindowRbuttonup(hwnd, wParam, lParam);
return 0;
case kNtWmMousemove:
OnWindowMousemove(hwnd, wParam, lParam);
return 0;
case kNtWmCommand:
case kNtWmSyscommand:
switch (wParam & ~0xF) {
case IDM_ABOUT:
OnMenuAbout(hwnd);
return 0;
case IDM_OPEN:
OnMenuOpen(hwnd);
return 0;
}
/* fallthrough */
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
}
static void Gui(void) {
int64_t hwnd, mh;
struct NtMsg msg;
struct NtWndClass wc;
memset(&wc, 0, sizeof(wc));
wc.lpfnWndProc = NT2SYSV(WindowProc);
wc.hInstance = GetModuleHandle(NULL);
wc.hCursor = LoadCursor(0, kNtIdcCross);
wc.lpszClassName = kClassName;
wc.hbrBackground = kNtColorInactiveborder;
CHECK(RegisterClass(&wc));
CHECK((hwnd = CreateWindowEx(0, kClassName, u"Conway's Game of Life",
kNtWsOverlappedwindow, kNtCwUsedefault,
kNtCwUsedefault, kNtCwUsedefault,
kNtCwUsedefault, 0, 0, wc.hInstance, 0)));
mh = GetSystemMenu(hwnd, false);
AppendMenu(mh, kNtMfSeparator, 0, 0);
AppendMenu(mh, kNtMfEnabled, IDM_OPEN, u"&Open File...");
AppendMenu(mh, kNtMfEnabled, IDM_ABOUT, u"&About...");
ShowWindow(hwnd, kNtSwNormal);
while (GetMessage(&msg, 0, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
/*───────────────────────────────────────────────────────────────────────────│─╗
│ cosmopolitan § game of life » program ─╬─│┼
╚────────────────────────────────────────────────────────────────────────────│*/
int main(int argc, char *argv[]) {
if (!NoDebug()) showcrashreports();
out = 1;
speed = 1;
tyn = right = 80;
txn = bottom = 24;
byn = 64 * 64;
bxn = 64 * 64;
strcpy(name, "apelife");
GetOpts(argc, argv);
AllocateBoardsWithHardwareAcceleratedMemorySafety();
if (optind < argc) {
if (LoadFile(argv[optind]) == -1) {
fprintf(
stderr, "%s:%d:%d: %s\n", argv[optind], line + 1, column,
"error: failed to load game of life run length encoded (rle) file");
return 1;
}
}
if (0 && IsWindows()) {
Gui();
} else {
Tui();
}
return 0;
}