iterate through c/cpp header files and list defines.

print_defines.lua

--
-- print_defines.lua; probably the first lua header defines fetcher created in 2018 ;)
-- 01.01.2018 / ThorstenK / Marcedo { at } habMalNeFrage. { de}
-- License: BSD three Clause
-- grab all function defines, list their names (with parameters)
-- exclude Constants, exclude _underscoredStuff, exclude multiline stuff. 
-- (see code Docs and modify the --filter section)
--


dirSep="\\" --change to match your systems Platform

--
-- splits a string at a given separator 
-- returns string when no sep was found.
--
local function split_last (s,ch)
    local i = #s
    while i > 0 do
        if string.sub(s,i,i) == ch then
					return string.sub(s,i+1)			
        end
        i = i - 1
    end
	 return s 
end

--
-- Iterates through a given headerfile
-- Lists defines according to the --Filter Section 
--
function list_defines(filePath)
outline=" "

	-- input section --
	if not filePath then filePath="ndis.h" end --testing
	if not filePath:match(".h") then return end
	if filePath:match("^_") then return end --c std / mingw internal functions	
	
	print("["..split_last(filePath,dirSep).."]")
	for entry in io.lines(filePath) do
	--  parse section --
		local name=nil rest=nil func1=nil func2=nil multiline=false write=true
		
		name, rest=entry:match("#define ([%w_]+)(%(.*)")  -- funcName, param and rest of line  [#define ble(...) blo(...)]
		if rest then	
			rest=string.gsub(rest," ","") -- Normalises function deco containing spaces.
			param,func2=rest:match("^([%(|%w|%d|%,|%.|%_|]+%))(.*)" ) --  funcNameParam to nothing [#define bly(qwe)]
			if rest:match("%\\") then multiline=true param="multi_line" end
			func1=name..param
		end 
		if not func1 then func1,func2=entry:match("#define ([%w_]+)%s+([a-zA-Z_]+)$") end -- names without parameter [#define bla blubb]
		if not func1 then func1,func2=entry:match("#define ([%w_]+)%s+([a-zA-Z_]+%(.*)") end -- name to function [#define bla __mingwname(...)]
		if not func2 then func2 ="" else 
			if func2:match("%\\") then multiline=true func2="multi_line" func1 = name end -- tag and include names of multiline defines
		end
				
	-- Filter section --
		if func1 then
			if func2 then together= func1..func2 end
			if multiline then write=false end -- strip multiline defines (param has Backslash)
			if func2:match("^[%s_]+")  then write=false end -- strip compiler internals (param begins with underscore)
			if func2:match("sizeof")  then write=false end -- strip sizeof Macro based constants 
			if together:match("^[%s_]+")  then write=false end --strip compiler internals (func Name begins with underscore)
			if together:match("TEXT") then write=false end  -- strip TEXT Macro based constants 
			if together:match("IID") then write=false end -- strip GUID Constants
			if together:match("GUID_BUILDER") then write=false end
			if func1:match("^[^%l]+$") then write=false end -- strip all Uppercases constants
			--if func1:match("^[^%l]+%(") then write=false end -- strip all Uppercases functions
			if together:match("__MINGW_NAME_AW") then write=true end 
			if  write then outline=outline.."{"..func1.."}{"..func2.."}".."\n" end
		end
	end
	
print(outline)
--outFile=io.open("outFile","a+")
--if outline then outFile:write(outline) end
--io.close(outFile)
end

list_defines(arg[1])