?: reverse

1
? reverse

File
30
75
102
156
...
\n
\n
\n
\n
LineStart
0
0
1
30
2
75
3
102
...
n
2
? reverse

• Step 1
• Parse command line
• parseCommandLine, processOptions
• Step 2
• open input file for reading
• read from file, storing the starting offset of
  each line in an array
• pass1( ), trackLines
• Step 3
• read the input file again backward, copying each
  line to stdout
• reverse the line if the -c option was chosen
• pass2( )