/*
 * Copyright (c) 2012-2023 Daniele Bartolini <dbartolini@crownengine.org>
 * SPDX-License-Identifier: MIT
 */

[CCode (cheader_filename = "tinyexpr.h")]
namespace TinyExpr
{
	[CCode (cname = "", cprefix = "TE_", has_type_id = false)]
	public enum VariableType {
		VARIABLE,

		FUNCTION0,
		FUNCTION1,
		FUNCTION2,
		FUNCTION3,
		FUNCTION4,
		FUNCTION5,
		FUNCTION6,
		FUNCTION7,

		CLOSURE0,
		CLOSURE1,
		CLOSURE2,
		CLOSURE3,
		CLOSURE4,
		CLOSURE5,
		CLOSURE6,
		CLOSURE7,

		FLAG_PURE
	}

	[Compact]
	[CCode (cname = "te_expr", free_function = "te_free")]
	public class Expr {
		int type;
		[CCode (cname = "value")]
		double value;
		[CCode (cname = "bound")]
		double *bound;
		[CCode (cname = "function")]
		void *function;
		void *parameters[1];
	}

	[SimpleType]
	[CCode (cname = "te_variable", has_type_id = false)]
	public struct Variable {
		char *name;
		void *address;
		int type;
		void *context;
	}

	[CCode (cname = "te_interp")]
	double interp(string expression, out int error);

	[CCode (cname = "te_compile")]
	Expr compile(string expression, Variable[] variables, out int error);

	[CCode (cname = "te_eval")]
	double eval(Expr n);

	[CCode (cname = "te_print")]
	void print(Expr n);
}