#include <u.h>#include <libc.h>#include <draw.h>#include <thread.h> #include "map.h"#include "bt.h" #include "dat.h" Point cardinals[] = {[WEST]	{ -1,  0 },[SOUTH]	{  0,  1 },[NORTH]	{  0, -1 },[EAST]	{  1,  0 },[NODIR]	{  0,  0 },}; /* pick a random point along some side of the rect, no corners */Pointpickpoint(Rectangle r, int dir, int inset){	Point p; 	assert(inset >= 0); 	switch(dir){	case WEST:		p = Pt(r.min.x, r.min.y + nrand(Dy(r)-inset) + inset);		break;	case SOUTH:		p = Pt(r.min.x + nrand(Dx(r)-inset) + inset, r.max.y);		break;	case NORTH:		p = Pt(r.min.x + nrand(Dx(r)-inset) + inset, r.min.y);		break;	case EAST:		p = Pt(r.max.x, r.min.y + nrand(Dy(r)-inset) + inset);		break;	default:		abort();	} 	r.max.x++;	r.max.y++;	assert(ptinrect(p, r)); 	return p;} introll(int count, int sides){	int d;	d = 0;	while(count--> 0)		d += 1+nrand(sides);	return d;} intparseroll(char *str, int *count, int *sides){	int i;	char *f[2]; 	if(str == nil || count == nil || sides == nil)		return 0; 	i = gettokens(str, f, 2, "d");	if(i != 2)		return 0; 	*count = atoi(f[0]);	*sides = atoi(f[1]);	return 1;} intmin(int a, int b){	if(a < b)		return a;	return b;} intmax(int a, int b){	if(a > b)		return a;	return b;} /* needed because p9p doesn't have frand for some reason. */#define	MASK	0x7fffffffL#define	NORM	(1.0/(1.0+MASK)) doublefrand(void){	double x; 	do {		x = lrand() * NORM;		x = (x + lrand()) * NORM;	} while(x >= 1);	return x;} void*emalloc(ulong size){	void *p; 	p = mallocz(size, 1);	if(p == nil)		sysfatal("out of memory allocating %lud bytes", size);	setmalloctag(p, getcallerpc(&size));	return p;}