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Contents
module OrigenAppGenerators
require 'strscan'
# Responsible for parsing something like this:
#
# "ram, osc, pll, atd(2), comms[ram(2), osc](3)"
#
# into this:
#
# {
# "RAM"=>{}, "Osc"=>{}, "PLL"=>{}, "ATD"=> {:instances=>2},
# "Comms"=>{:instances=>3, :children=>{"RAM"=>{:instances=>2}, "Osc"=>{}}}
# }
#
class SubBlockParser
def parse(str)
r = {}
split(str).each do |tag|
tag, i = extract_instances(tag)
name, children = extract_children(tag)
name = camelize(name)
r[name] = {}
r[name][:instances] = i if i
r[name][:children] = children if children
end
r
end
private
# Splits the given string by comma, but understands that nested
# commas should not be split on
def split(str)
r = []
str = StringScanner.new(str)
r << next_tag(str) until str.eos?
r
end
def next_tag(str)
v = str.scan_until(/,|\[|$/)
if v[-1] == ','
v.chop.strip
elsif v[-1] == '['
open = 1
while open > 0
v += str.scan_until(/\[|\]/)
if v[-1] == '['
open += 1
else
open -= 1
end
end
v += next_tag(str)
# End of line
else
v.strip
end
end
def extract_children(tag)
# http://rubular.com/r/plGILY2e2U
if tag.strip =~ /([^\[]*)\[(.*)\]/
[Regexp.last_match(1), parse(Regexp.last_match(2))]
else
[tag.strip, nil]
end
end
def extract_instances(tag)
if tag.strip =~ /(.*)\((\d+)\)$/
[Regexp.last_match(1), Regexp.last_match(2).to_i]
else
[tag.strip, nil]
end
end
def camelize(val)
val.strip.gsub(/\s+/, '_').camelize
end
end
end
Version data entries
28 entries across 28 versions & 2 rubygems