/*
 * Copyright (c) Camden Dixie O'Brien
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#include <stdio.h>
#include <stdlib.h>

#include "evaluator.h"
#include "reader.h"

#define BUFFER_SIZE 128U

static memory_pool_t pool;
static char buffer[BUFFER_SIZE];

static bool step_repl(void)
{
	init_memory_pool(&pool);

	const int len = read_line(getchar, buffer, BUFFER_SIZE);
	if (len < 0)
		return false;

	expression_t *expression;
	const int used = parse_expression(&pool, buffer, len, &expression);
	if (used != len) {
		puts("Invalid expression");
		return true;
	}

	const int result = evaluate(expression);
	printf("%d\n", result);

	return true;
}

int main(void)
{
	while (step_repl())
		;
	return EXIT_SUCCESS;
}