import strutils proc hexDump*(s: string | cstring, cols: int = 16, offs: int = 2): string = result = newStringOfCap(s.len * 3 - 1 + (s.len div cols + 1) * (offs + 2)) var newLine = true for idx, c in s: if idx > 0: if idx mod cols == 0: result.add "\n" newLine = true else: result.add ' ' if newLine: newLine = false result.add idx.toHex offs result.add ": " result.add ord(c).toHex 2 echo hexDump("0123456789ABCDEF\nHello World! The Hexdump!")