#include "repl.h"

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

#include <stdio.h>
#include <string.h>

bool step_repl(repl_t *repl)
{
	init_memory_pool(&repl->pool);

	const int len = read_line(getchar, repl->buffer, REPL_BUFFER_SIZE);
	if (len < 0)
		return false;
	const expression_t *e = read_expression(&repl->pool, repl->buffer, len);
	if (NULL == e) {
		puts("Invalid expression\n");
		return true;
	}

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

	return true;
}

void run_repl(repl_t *repl)
{
	while (step_repl(repl))
		;
}