Module: TraceLineNumbers

Defined in:
lib/tracelines.rb,
ext/trace_nums.c

Overview

require ‘ruby-debug’ ; Debugger.start(:post-mortem => true)

Constant Summary collapse

@@SRC_DIR = 
File.expand_path(File.dirname(__FILE__))

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 17

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

.lnums_for_str(src) ⇒ Object

Return a list of trace hook line numbers for the string in Ruby source src



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# File 'ext/trace_nums.c', line 690

static VALUE 
lnums_for_str(VALUE self, VALUE src) {
  VALUE result = rb_ary_new(); /* The returned array of line numbers. */
  NODE *node = NULL;
  int critical;

  ruby_nerrs = 0;
  StringValue(src); /* Check that src is a string. */

  critical = rb_thread_critical;
  rb_thread_critical = Qtrue;

  /* Making ruby_in_eval nonzero signals rb_compile_string not to save
     source in SCRIPT_LINES__. */
  ruby_in_eval++; 
  node = rb_compile_string("(numbers_for_str)", src, 1);
  ruby_in_eval--;

  rb_thread_critical = critical;

  if (ruby_nerrs > 0) {
    ruby_nerrs = 0;
#if RUBY_VERSION_CODE < 190
    ruby_eval_tree_begin = 0;
#endif
    rb_exc_raise(ruby_errinfo);
  }

  if (RTEST(ruby_debug)) {
    indent_level = 0;
  }
  ln_eval(self, node, result);
  return result;
}

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

Return an array of lines numbers that could be stopped at given a file name of a Ruby program. We assume the each line has n at the end. If not set the newline parameters to n.



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# File 'lib/tracelines.rb', line 26

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