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implement Sleep;
include "sys.m";
sys: Sys;
include "draw.m";
Sleep: module
{
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
init(nil: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
if(sys == nil || argv == nil)
return;
argv = tl argv;
if(argv != nil && isvalid(hd argv)){
t := int hd argv;
if(t > 16r7fffffff / 1000)
t = 16r7fffffff / 1000;
sys->sleep(t * 1000);
} else {
sys->fprint(sys->fildes(2), "usage: sleep time\n");
raise "fail:usage";
}
}
isvalid(t: string): int
{
l := len t;
if(l > 0 && (t[0] == '-' || t[0] == '+'))
x := 1;
else
x = 0;
ok := 0;
while(x < l) {
d := t[x];
if(d < '0' || d > '9')
return 0;
ok = 1;
x++;
}
return ok;
}
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