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Contents
module FFI
# @private
class Generator
def initialize(ffi_name, rb_name, options = {})
@ffi_name = ffi_name
@rb_name = rb_name
@options = options
@name = File.basename rb_name, '.rb'
file = File.read @ffi_name
new_file = file.gsub(/^( *)@@@(.*?)@@@/m) do
@constants = []
@structs = []
indent = $1
original_lines = $2.count "\n"
instance_eval $2, @ffi_name, $`.count("\n")
new_lines = []
@constants.each { |c| new_lines << c.to_ruby }
@structs.each { |s| new_lines << s.generate_layout }
new_lines = new_lines.join("\n").split "\n" # expand multiline blocks
new_lines = new_lines.map { |line| indent + line }
padding = original_lines - new_lines.length
new_lines += [nil] * padding if padding >= 0
new_lines.join "\n"
end
open @rb_name, 'w' do |f|
f.puts "# This file is generated by rake. Do not edit."
f.puts
f.puts new_file
end
end
def constants(options = {}, &block)
@constants << FFI::ConstGenerator.new(@name, @options.merge(options), &block)
end
def struct(options = {}, &block)
@structs << FFI::StructGenerator.new(@name, @options.merge(options), &block)
end
##
# Utility converter for constants
def to_s
proc { |obj| obj.to_s.inspect }
end
end
end
Version data entries
231 entries across 173 versions & 29 rubygems