#include "utils.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>

i64 parse_int(char *s, usize len)
{
	bool negative = false;
	if (*s == '-') {
		s += 1;
		len -= 1;
		negative = true;
	}

	u64 int_part = 0;
	for (usize i=0; i < len; i++) {
		int_part = (int_part * 10) + (s[i] - '0');
	}

	if (negative) {
		int_part *= -1;
	}

	return int_part;
}

f64 parse_float(char *s, usize len)
{
	bool negative = false;
	if (*s == '-') {
		s += 1;
		len -= 1;
		negative = true;
	}

	usize point_pos = 0;
	for (usize i=0; i < len; i++) {
		if (s[i] == '.') {
			point_pos = i;
			break;
		}
	}

	i64 int_part = parse_int(s, point_pos);
	i64 dec_part = parse_int(s+point_pos+1, len-point_pos-1);
	for (usize i=0; i < len-point_pos-1; i++) {
		int_part *= 10;
	}

	int_part += dec_part;

	f64 f = (f64) int_part;

	point_pos += 1;

	for (usize i=0; i < len - point_pos; i++) {
		f /= 10.0;
	}

	if (negative) {
		f *= -1;
	}

	return f;
}