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FEAT: add donut.c demo by Andy Sloane

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boreddevnl 2026-04-17 23:11:06 +02:00
parent 3eafa5b360
commit d4b066c29f
2 changed files with 43 additions and 3 deletions
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6
src/userland/Makefile
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@ -13,10 +13,10 @@ BIN_DIR = bin
LIBC_SOURCES = $(wildcard libc/*.c)
LIBC_OBJS = $(patsubst libc/%.c, $(BIN_DIR)/%.o, $(LIBC_SOURCES)) $(BIN_DIR)/crt0.o $(BIN_DIR)/libwidget.o
VPATH = cli gui sys games libc net
vpath %.c cli gui sys games libc net
VPATH = cli gui sys games libc net cli/third_party
vpath %.c cli gui sys games libc net cli/third_party
APP_SOURCES_FULL = $(wildcard cli/*.c gui/*.c sys/*.c games/*.c *.c net/*.c)
APP_SOURCES_FULL = $(wildcard cli/*.c gui/*.c sys/*.c games/*.c *.c net/*.c cli/third_party/*.c)
APP_SOURCES = $(filter-out stb_image.c, $(APP_SOURCES_FULL))
APP_ELFS = $(patsubst %.c, $(BIN_DIR)/%.elf, $(notdir $(APP_SOURCES)))

40
src/userland/cli/third_party/donut.c vendored Normal file
View file

@ -0,0 +1,40 @@
/*
* donut.c - A rotating ASCII donut in C, but the code is a donut aswell.
* Created by Andy Sloane (@a1k0n) in 2006.
* * Source: https://www.a1k0n.net/2006/09/15/obfuscated-c-donut.html
*
* LICENSE NOTE:
* This file is included in BoredOS as a demonstration.
* This specific file is NOT covered by the project's GPLv3 license
* and remains the intellectual property of Andy Sloane.
* Use of this file is subject to the author's original terms.
*/
#include <stdlib.h>
#include <syscall.h>
int putchar(int c) {
char ch = (char)c;
return sys_write(1, &ch, 1);
}
int k;double sin()
,cos();int main(){float A=
0,B=0,i,j,z[1760];char b[
1760];printf("\x1b[2J");for(;;
){memset(b,32,1760);memset(z,0,7040)
;for(j=0;6.28>j;j+=0.07)for(i=0;6.28
>i;i+=0.02){float c=sin(i),d=cos(j),e=
sin(A),f=sin(j),g=cos(A),h=d+2,D=1/(c*
h*e+f*g+5),l=cos (i),m=cos(B),n=s\
in(B),t=c*h*g-f* e;int x=40+30*D*
(l*h*m-t*n),y= 12+15*D*(l*h*n
+t*m),o=x+80*y, N=8*((f*e-c*d*g
)*m-c*d*e-f*g-l *d*n);if(22>y&&
y>0&&x>0&&80>x&&D>z[o]){z[o]=D;;;b[o]=
".,-~:;=!*#$@"[N>0?N:0];}}/*#****!!-*/
printf("\x1b[H");for(k=0;1761>k;k++)
putchar(k%80?b[k]:10);A+=0.04;B+=
0.02;}}/*****####*******!!=;:~
~::==!!!**********!!!==::-
.,~~;;;========;;;:~-.
..,--------,*/