research/hhe/gen-ptr-table

#!/usr/bin/env ruby
#
# Generate the table of offsets for different action pointers
# in the different Heretic versions.
#

require "common.rb"

def action_func_names
	names = {}

	for config in CONFIGS
		config::ACTION_POINTERS.each_value do |name|
			names[name] = true
		end
	end

	names.keys
end

def get_func_offset(config, name)
	config::ACTION_POINTERS.each_pair do |offset, funcname|
		if name == funcname
			return offset
		end
	end

	0
end

def func_offsets(name)
	CONFIGS.map do |config|
		get_func_offset(config, name)
	end
end

def format_func_offsets(offsets)
	formatted = offsets.map do |offset|
		if offset == 0
			"  NULL"
		else
			sprintf("%6i", offset)
		end
	end

	"{ " + formatted.join(", ") + " }"
end

puts "static HHEActionPointer action_pointers[] = {"

for name in action_func_names.sort
	offsets = func_offsets(name)
	print "    { "
	print format_func_offsets(offsets) + ", "
	print name.to_json
	print " },\n"
end

puts "};"
puts