Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-vpi/util.rb,
lib/ruby-vpi/float.rb,
lib/ruby-vpi/verilog_parser.rb

Overview

Library for hardware-related floating point operations. – Copyright 2006 Suraj N. Kurapati See the file named LICENSE for details.

Instance Method Summary collapse

Instance Method Details

#rstrip_from(char) ⇒ Object

Strips off everything after the given character in this string.



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# File 'lib/ruby-vpi/util.rb', line 13

def rstrip_from char
  sub(/#{char}[^#{char}]*$/, '')
end

#to_f(aRadix = 10) ⇒ Object

Converts this string into a floating point number using the given radix. The default radix is 10.



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# File 'lib/ruby-vpi/float.rb', line 9

def to_f aRadix = 10
  whole, frac = split('.', 2)
  whole = whole.to_i(aRadix).to_f

  if frac
    f = 0.0

    frac.length.times do |i|
      power = i.next
      weight = aRadix ** -power
      digit = frac[i, 1].to_i(aRadix)

      f += digit * weight
    end

    f = -f if self =~ /^-/
    whole += f
  end

  whole
end

#to_ruby_const_name ⇒ Object

Converts this string into a valid Ruby constant name.



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# File 'lib/ruby-vpi/util.rb', line 8

def to_ruby_const_name
  self[0, 1].upcase << self[1..-1]
end

#verilog_to_ruby ⇒ Object

Converts this string containing Verilog code into syntactically correct Ruby code.



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# File 'lib/ruby-vpi/verilog_parser.rb', line 70

def verilog_to_ruby
  content = self.dup

  # single-line comments
    content.gsub! %r{//(.*)$}, '#\1'

  # multi-line comments
    content.gsub! %r{/\*.*?\*/}m, "\n=begin\n\\0\n=end\n"

  # preprocessor directives
    content.gsub! %r{`include}, '#\0'

    content.gsub! %r{`define\s+(\w+)\s+(.+)} do
      "#{$1.to_ruby_const_name} = #{$2}"
    end

    content.gsub! %r{`+}, ''

  # numbers
    content.gsub! %r{\d*\'([dohb]\w+)}, '0\1'

  # ranges
    content.gsub! %r{(\S)\s*:\s*(\S)}, '\1..\2'

  content
end