fasmg-include/inline.inc

; vim:ft=fasm:
; taken from: https://github.com/tgrysztar/fasmg

; Simple preprocessor for inline macros.

; Example of use:
;
;	inlinemacro oddflip(number)
;		return = (number) xor 1
;	end inlinemacro
;
;	db oddflip(3), oddflip(oddflip(0) shl 1)

include 'xcalm.inc'

define inlinemacro? inlinemacro

calminstruction inlinemacro?! declaration&
	local	name
	match	name(arguments?), declaration
	jyes	define
	match	name= arguments?, declaration
	jyes	define
	match	name arguments?, declaration
    define:
	arrange tmp, =__inline__.name
	arrange name, =inlinemacro.name
	publish name, tmp
	arrange tmp, =struc (=return?) name arguments
	assemble tmp
end calminstruction

macro end?.inlinemacro?!
	end struc
end macro

macro inlinemacro?.enable?
	calminstruction ?! text&
		local	head, tail, name, arguments, more, i
		init	i, 0
		match	=inlinemacro? more, text
		jyes	ready
		transform text, inlinemacro
		jno	ready
		match	=else? more, text
		jno	preprocess
		compute i, i+1
		arrange text, =__inline__.(=else =if 1) =__inline__.(=__return__.i==1) text =__inline__.(=end =if) =__inline__.(=if ~=definite =__return__.i)
	    preprocess:
		match	head? =__inline__.name?(tail?, text
		jno	ready
		match	arguments?) tail?, tail
		jno	ready	; syntax error
	    collect:
		match	arguments?, arguments, ()
		jyes	inline
		match	more?) tail?, tail
		jno	ready	; syntax error
		arrange arguments, arguments) more
		jump	collect
	    inline:
		match	, name
		jyes	special
		local	tmp, return
		compute i, i+1
		arrange return, =__return__.i
		arrange tmp, return =inlinemacro.name arguments
		arrange text, head return tail
		take	text, tmp
		jump	preprocess
	    special:
		arrange text, head tail
		take	text, arguments
		jump	preprocess
	    ready:
		assemble text
		take	, text
		take	text, text
		jyes	preprocess
	end calminstruction
end macro

;macro include? file*
;	include file, inlinemacro.enable
;	purge ?
;end macro

inlinemacro.enable