Actually add 1991/buzzard/buzzard.alt.c

The alt version can be more at home for those familiar with vi(m) (it
certainly is for me): instead of 'f' for forwards, 'l' for left and 'r'
for right it is now 'k', 'h' and 'l' respectively. The program does not
allow one to go backwards so this was not touched but if it did it would
have been 'j': because we vi(m) users are strange :-)

1991/buzzard/.gitignore

@@ -1,3 +1,4 @@
 buzzard
+buzzard.alt
 buzzard.orig
 prog.orig

1991/buzzard/buzzard.alt.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#define X(s) (!(s&3)-((s&3)==2))
+#define W while
+char Z[82][82],A,B,f,g=26;z(q)char**q;{return atoi(q);}m(d,l){return
+Z[   B       +    X      (   f     +
+3) * d+l *X(f+ 2 )][ A+X ( f ) * d +
+l* X           (     f     + 3 ) ] ;}int
+h= 0;D(p,s)char*s; {W(h>>3<p>> 3 ) {putchar('\t'
+);           h =       (       h   +8
+)&~7 ;}W(h < p ){putchar(' ');++h; }(void)printf(
+"%s"   ,   s                 )     ;h+=strlen(s);}main(x,a)char **a; {
+# define P(x) (x?(5-(x))*(6-(x ))/2:11)
+int b; { char b[256],i,  j=0;  FILE*F;F=fopen(x-1?a[1]:__FILE__,"r");W(
+fgets( b ,256 ,F)){for(i=0;b[ i];++ i)
+Z[j][i ] =( b [     i   ]     ==' '?1:2*(b[i]==(x>2?*a[2]:'\\')));++j;}fclose
+(F);}A   =4 ; B = 3 ; f = 1;x >3? A=z(a[3]),B=z(a[4]):0;b='\n';do{if(b=='\n'
+){int y ,     s , d , p   , q       ,i;for
+(y=-11; y<= 11;++ y){ for(s = 1 ,d=0;s+3;s-=2){for
+(;d!=2    +       3   * s     ;     d+=s){
+if(m(d,0) !=1 ){p=P (d) ;if (abs( y )
+   <p&&   !   m       (       d   , 0 )||abs(y)>p)break;for
+(i  =-p;i<p;++i)D(g+i*2,"--");D(0,"\-");break;}if(d==5)continue;
+p=P(d+1);q=P(d);if
+(abs(y)		>q)continue;if 
+(abs(y)		<p)D(g-s*(2*p+1),"|");else if(m(d,s)){if
+(abs(y)		<=p)for(i=(s==1?-q:p);i!=(s==1?-p:q);
+(abs(y)		),++i)D(g+2*i+(s==-1),"--");}else if
+(abs(y)		==p)D(g-s*(2*p+1),"|");else D(g-
+(abs(y)		*s*2),(s==1)^(y>0)?"\\":"/");}d-=s;}puts(
+"");h=0;}}f+=(b=='l')-(b=='h');f&=3;if(b=='k'){if(!m(1,0))continue;
+A+=X(f);B+=X(f-1);}}W((b=getchar())!=-1&&m(0,0)==1);return 0;}