AWK HSL to RGB conversion

hsl_to_rgb.sh

awk -F "[, ]+" '\
# Returns minimum number
function abs(num) {
  if (num < 0.0)
    return num*-1.0
  return num
}
# Main function
function to_rgb(H, S, L){
   H=H%360.0
   S=abs(S)
   if (S < 0.0) S=0.0
   if (S > 1.0) S=1.0
   L=abs(L)
  if (L < 0.0) L=0.0
  if (L > 1.0) L=1.0
  C=(1.0-abs((2.0*L)-1.0))*S
  X=C*(1.0-abs(((H/60.0)%2.0)-1.0))
  m=L-(C/2.0)
  if (H >= 300.0) {
    Rp=C; Gp=0.0; Bp=X 
  } else if (H >= 240.0) {
    Rp=X; Gp=0.0; Bp=C
  } else if (H >= 180.0) {
    Rp=0.0; Gp=X; Bp=C
  } else if (H >= 120.0) {
    Rp=0.0; Gp=C; Bp=X
  } else if (H >= 60.0) {
    Rp=X; Gp=C; Bp=0.0
  } else {
    Rp=C; Gp=X; Bp=0.0
  }
  R=(Rp+m)*255.0
  G=(Gp+m)*255.0
  B=(Bp+m)*255.0
  print int(R+0.5), int(G+0.5), int(B+0.5)
}
# Script execution starts here
{
   to_rgb($1*1.0, $2*1.0, $3*1.0)
}'