/*
 * Copyright 2006-2009 Johannes Hofmann <Johannes.Hofmann@gmx.de>
 */

load("stringproc")$

varsubst(v) := ssubst("_", "%", string(v))$

printdecl(vars) := (
	sprint("double", varsubst(first(vars))),
	for v in rest(vars) do sprint(",", varsubst(v)),
	sprint(";"))$

printdef(expr) := sprint(varsubst(first(expr)), "=", varsubst(second(expr)), ";")$

block2c(expr) := 
	if ?equal(op(expr), block) then (
		printdecl(first(expr)),
		for d in reverse(rest(reverse(rest(expr)))) do printdef(d),
		sprint("return", varsubst(last(expr)), ";"))
	else
		sprint("return", varsubst(expr), ";")$

expr2c(funcname, argstr, expr) := (
	sprint("double", funcname, "(", argstr, ") {"),
	block2c(subst(pow, "^", optimize(expr))),
	sprint("}", "
"))$