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#!/usr/bin/env ruby
require 'trollop'
require 'xmlsimple'
require_relative 'parse'
def read_grammar fn, add_glue, add_pass_through
STDERR.write "> reading grammar '#{fn}'\n"
grammar = Grammar::Grammar.new fn
if add_glue
STDERR.write ">> adding glue grammar\n"
grammar.add_glue_rules
end
if add_pass_through
STDERR.write ">> adding pass-through grammar\n"
grammar.add_pass_through_rules input
end
return grammar
end
def main
cfg = Trollop::options do
opt :input, "", :type => :string, :default => '-', :short => '-i'
opt :grammar, "", :type => :string, :default => nil, :short => '-g'
opt :weights, "", :type => :string, :default => nil, :short => '-w'
opt :add_glue, "", :type => :bool, :default => false, :short => '-h'
opt :add_pass_through, "", :type => :bool, :default => false, :short => '-p'
end
grammar = nil
if cfg[:grammar]
grammar = read_grammar cfg[:grammar], cfg[:add_glue], cfg[:add_pass_through]
end
STDERR.write "> reading input from '#{cfg[:input]}'\n"
ReadFile.readlines_strip(cfg[:input]).each { |input|
x = XmlSimple.xml_in(input)
input = x['content'].split
n = input.size
if x['grammar']
grammar = read_grammar x['grammar'], cfg[:add_glue], cfg[:add_pass_through]
end
STDERR.write "> initializing charts\n"
passive_chart = Parse::Chart.new n
active_chart = Parse::Chart.new n
Parse::init input, n, active_chart, passive_chart, grammar
STDERR.write "> parsing\n"
Parse::parse input, n, active_chart, passive_chart, grammar
weights = SparseVector.from_kv(ReadFile.read(cfg[:weights]), ' ', "\n")
if !weights
weights = SparseVector.new
end
hypergraph, nodes_by_id = passive_chart.to_hg weights
STDERR.write "> viterbi\n"
semiring = ViterbiSemiring.new
path, score = HG::viterbi_path hypergraph, nodes_by_id[-1], semiring
s = HG::derive path, path.last.head, []
puts "#{s.map { |i| i.word }.join ' '}"
puts Math.log score
puts
}
end
main
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