Module: ParseHelper

Defined in:
lib/ParseHelper.rb

Overview

This module defines a number of helper methods that assist the Parser class in completing its task.

Class Method Summary collapse

Class Method Details

.get_port_names(str, insts) ⇒ Object

Takes a string (str) that defines a netlist and a hash of all existing Inst objects (insts) as input and produces an array of unique port names that are defined as connections in that netlist.



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

def self.get_port_names(str,insts)
  a = []
  i = 0
  s=""
  # while we are not at the end of the line
  while i < str.length
    # append current character to a new string
    s << str[i].chr
    # if the parens match append it to an array
    if parens_check(s)
      a << self.parse_port_names(s,insts)
      s = ""
    end
    # keep checking
    i+=1
  end
  # return the array (use uniq to get rid of duplicate bufz ports)
  a.uniq
end

.member_inst_names(numports, instname) ⇒ Object

Takes an integer (numports) and the name of an Inst (instname) and returns an array of Inst names properly formatted to take into account the fact that the Inst has multiple bits.



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# File 'lib/ParseHelper.rb', line 10

def self.member_inst_names(numports,instname)
  p = 0
  a = []
  # while we have not reached the number of ports
  while p < numports
    # add a port name to the array
    addstr = "#{instname}m#{p}"
    a << addstr
    p+=1
  end
  # return the array
  a
end

.parens_check(str) ⇒ Object

Takes a string (str) as input and returns true if the given string has matching sets of parentheses, otherwise it returns false.



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# File 'lib/ParseHelper.rb', line 4

def self.parens_check(str)
  str.count("(") == str.count(")")
end

.portname_split(str) ⇒ Object

Takes a string of a portname (str) as input and returns an array where the first element is the name of the Inst object to which the port belongs, and the second element is the port it represents on the given Inst.



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# File 'lib/ParseHelper.rb', line 48

def self.portname_split(str)
  a = []
  if str =~ /(\w+)((p\d+\z|out\z))/
  a[0] = $1
  a[1] = $2
  else
    raise "Invalid EDF"
  end
  a
end