check syscall return values in a few questions; thanks go to Ian Darwin's
[unix-history] / usr / src / lib / libplot / gigi / line.c
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9d14135c
RC
1#ifndef lint
2static char sccsid[] = "@(#)line.c 4.1 (Berkeley) %G%";
3#endif
4
5#include "gigi.h"
6
7line(x0,y0,x1,y1)
8int x0,y0,x1,y1;
9{
10 if(xsc(x0)==currentx && ysc(y0)==currenty)
11 cont(x1,y1);
12 else if(xsc(x1)==currentx && ysc(y1)==currenty)
13 cont(x0,y0);
14 else{
15 move(x0,y0);
16 cont(x1,y1);
17 }
18}