ABS
d1 = ABS(x2 - x1);
d2 = ABS(y2 - y1);
if (ABS(p1->altitude - p2->altitude) <= dist &&
ABS(p1->xpos - p2->xpos) <= dist && ABS(p1->ypos - p2->ypos) <= dist)
clk = ABS(ar[0]) > ABS(ar[1]) ? 1 : 0;
ec = ABS (ecgroup[i]);
else if (ABS (ecgroup[sym]) == transsym)
#ifndef ABS
i, ABS(tecbck[i]));
mkdata(ABS(tecbck[i]));
yymecs_data[i] = ABS(tecbck[i]);
ecgroup[i] = ABS(ecgroup[i]);
ecgroup[i] = ABS(ecgroup[i]);
NUL_ec = ABS(ecgroup[0]);