drawrepl.c

来自「在x86平台上运行不可信任代码的sandbox。」· C语言 代码 · 共 24 行

#include "u.h"
#include "lib.h"
#include "draw.h"

int
drawreplxy(int min, int max, int x)
{
	int sx;

	sx = (x-min)%(max-min);
	if(sx < 0)
		sx += max-min;
	return sx+min;
}

Point
drawrepl(Rectangle r, Point p)
{
	p.x = drawreplxy(r.min.x, r.max.x, p.x);
	p.y = drawreplxy(r.min.y, r.max.y, p.y);
	return p;
}