Module: TraceLineNumbers

Defined in:
lib/tracelines.rb

Overview

Copyright © 2007, 2008, 2009, 2010, 2014

Rocky Bernstein <[email protected]>

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

Class Method Summary collapse

Class Method Details

.lnums_for_file(file) ⇒ Object

Return an array of lines numbers that could be stopped at given a file name of a Ruby program.



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# File 'lib/tracelines.rb', line 40

def lnums_for_file(file)
  lnums_for_str(File.read(file))
end

.lnums_for_str(src) ⇒ Object 



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# File 'lib/tracelines.rb', line 22

def self.lnums_for_str src
  name = "#{Time.new.to_i}_#{rand(2**31)}"
  iseq = RubyVM::InstructionSequence.compile(src, name)
  lines = {}
  iseq.disasm.each_line{|line|
    if /^\d+ (\w+)\s+.+\(\s*(\d+)\)$/ =~ line
      insn = $1
      lineno = $2.to_i
      next unless insn == 'trace'
      lines[lineno] = true
      # p [lineno, line]
    end
  }
  lines.keys
end

.lnums_for_str_array(string_array, newline = '', uniq = true) ⇒ Object

Return an array of lines numbers that could be stopped at given a string array.



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# File 'lib/tracelines.rb', line 47

def lnums_for_str_array(string_array, newline='', uniq=true)
  lnums_for_str(string_array.join(newline))
end