Le code "golfé"

https://en.wikipedia.org/wiki/Code_golf

char s[999];v[256],p,c,x,y,z,w,u;G(){return c=s[p++];}I(){for(u=p;G()==32;);return p-u;}Y(){c&&c-10&&Y(G());}f(){x=0;if(G()>96)x=v[c],G();for(;c-48u<10;G())x=x*10+c-48;return x;}t(g,h){for(g=f();c==42|c==37;)h=c,g=h-42?g%f():g*f();return g;}e(){for(z=t();c-43u<3;)y=44-c,z+=y*t();return z;}E(a,q){a=e();if(c-60u>2)return a;w=c-61;q=G()==61;p-=!q;x=e();return w?(a-x)*w>-q:a==x;}S(i){for(;I()>i|c==10;)Y();p=u;}Q(){for(G();G()-34;)putchar(c);G();}B(i,q,j,k,a,m,n){for(;;){j=I();if(c==10)continue;if(j<i|!c){p=u;return;}if(c==119|c==105|c==102){k=c;k-102?p+=k/4-25:(p+=2,m=G(),p+=8,v[m]=0);q=p;for(;;){a=k-102?E():v[m]<E();p+=k==102;G();if(!a){S(j);break;}B(j+1);if(k==105)break;k-102||v[m]++;p=q;}I()-j|c-101?p=u:(p+=4,G(),a?S(j):B(j+1));}else if(c==100){p+=2;k=G();Y();v[k]=p;S(j);}else{if(c>96){k=c;while(G()>96);c==40?k-112?(G(),n=p,p=v[k],B(2),p=n,G()):(s[p]-34?printf("%d",E()):Q(),puts(""),G()):(v[k]=E());}Y();}}}main(q,m,h){for(h=m=q=0;~(c=getchar());){c=c-9?c:32;h^=c==34;s[q]=c;q+=c-32?1:!m|h;m=c>32|m&&c-10;}B(0);}

In the end, I was able to implement these features:
- Integer variables (single letter) and literals Variable assignment
- Arithmetic with + - * % with precedence (unary + - only works at the beginning of an expression)
- Comparisons with < > <= >= == (only one per expression)
- Integer truthiness
- if and else
- while loops, including else blocks
- for x in range(y) loops, including else blocks
- Function definitions with no arguments
- Function calls, even recursive
- Indent-based blocks (without scope)
- print with a single string literal or integer expression
- Comments

"Si tous les cons volaient, il ferait nuit" F. Dard