#!/bin/sh

# colrm 1.00
# by Adam M. Costello
# <amc@cs.wustl.edu>
#
# Emulates BSD colrm command using awk.

awk '
  { a = a + 0
    b = b + 0
    if (a > 0)
      if (b >= a)
        print substr($0, 1, a - 1) substr($0, b + 1)
      else
        if (b > 0)
          print substr($0, 1, b - 1) substr($0, a + 1)
        else
          print substr($0, 1, a - 1)
    else
      print $0
  }
' a=${1-0} b=${2-0}