adding atoi_superscript and isdigit_superscript

srcs/ft_atol.c

@@ -3,27 +3,13 @@
 
 long ft_atol(const char *str)
 {
-	long long nbr;
-	int i;
-	int negatif;
+	long long result = ft_atoll(str);
 
-	i = 0;
-	negatif = 1;
-	nbr = 0;
+	// clamp to long range
+	if (result > LONG_MAX)
+		return LONG_MAX;
+	if (result < LONG_MIN)
+		return LONG_MIN;
 
-	// Skip leading whitespace
-	while ((str[i] == ' ') || (str[i] > 8 && str[i] < 14))
-		i++;
-
-	// Handle optional sign
-	if (str[i] == '-')
-		negatif = -1;
-	if (str[i] == '+' || str[i] == '-')
-		i++;
-
-	// parse integer
-	while (str[i] >= '0' && str[i] <= '9')
-		nbr = nbr * 10 + (str[i++] - '0');
-
-	return (nbr * negatif);
+	return (long)result;
 }