Add exit with value function

atoi.c

@@ -0,0 +1,116 @@
+int length(char *s);
+int exponent(int len);
+int total(char *s);
+int neg(char *s, int p);
+
+/**
+ * _atoi - Converts numbers in a string to integers
+ * @s: string
+ * Return: String number converted to int
+ */
+int _atoi(char *s)
+{
+	int i;
+	int len;
+	int number;
+	unsigned int body;
+	int expt;
+	int total_len;
+	int negatives;
+
+	len = length(s);
+	expt = exponent(len);
+	total_len = total(s);
+	body = 0;
+	for (i = total_len - len; s[i] != '\0'; i++)
+	{
+		number = (s[i] - 48) * expt;
+		body = number + body;
+		expt = expt / 10;
+	}
+	negatives = neg(s, total_len - len);
+	if (negatives % 2 != 0)
+		body = -body;
+	return (body);
+}
+
+/**
+ * length - Calculates the length of the number
+ * @s: string
+ * Return: The length of the number
+ */
+int length(char *s)
+{
+	int i;
+	int len;
+
+	for (i = 0, len = 0; s[i] != '\0'; i++)
+	{
+		if (s[i] >= 48 && s[i] <= 57)
+		{
+			len++;
+			if (s[i + 1] == 32) /* stopping for spaces*/
+				break;
+		}
+	}
+	return (len);
+}
+
+/**
+ * exponent - Calculates the exponent to multiply the number by
+ * @len: length of a number
+ * Return: The exponent of a number
+ */
+int exponent(int len)
+{
+	int expt;
+
+	for (expt = 1; len - 1 > 0; len--)
+	{
+		expt =  expt * 10;
+	}
+	return (expt);
+}
+
+/**
+ * total - Calculates the total length of a string up to the numbers
+ * @s: string
+ * Return: Total len of a string
+ */
+int total(char *s)
+{
+	int i;
+
+	for (i = 0; s[i] != '\0'; i++)
+	{
+		if (s[i] >= 48 && s[i] <= 57)
+		{
+			if (s[i + 1] < 48 || s[i + 1] > 57)
+			{
+				i++;
+				break;
+			}
+		}
+	}
+	return (i);
+}
+
+/**
+ * neg - Calculates the total number of negatives
+ * @s: string
+ * @p: position were the number starts in the string
+ * Return: Total count of negatives
+ */
+int neg(char *s, int p)
+{
+	int i;
+	int counter;
+
+	for (counter = 0, i = 0; i < p; i++)
+	{
+		if (s[i] == 45)
+			counter++;
+	}
+	return (counter);
+}
+

builtins.c

@@ -50,14 +50,35 @@ void env_b(__attribute__((unused))char *line)
 }
 
 /**
- * exit_b - Exits the shell. After freeing allocated resources.
+ * exit_b - Exits the shell with value 0. After freeing allocated resources.
+ * If exit value provided, exit with value. If exit value is not integer,
+ * exit with 2 and print error message.
  * @line: A string representing the input from the user.
  */
 void exit_b(char *line)
 {
+	int token_count = 0, value;
+	char **argv;
+	const char *delim = "\n\t ";
+
+	argv = token_interface(line, delim, token_count);
+	if (argv[1] == NULL)
+		value = 0;
+	else if (_atoi(argv[1]))
+		value = _atoi(argv[1]);
+	else
+	{
+		value = 2;
+		print_str("logout", 0);
+		printf("exit: %s: numeric argument required\n", argv[1]);
+		double_free(argv);
+		free(line);
+		exit(value);
+	}
+	double_free(argv);
 	free(line);
 	print_str("logout", 0);
-	exit(1);
+	exit(value);
 }
 
 /**

olaf.h

@@ -53,5 +53,10 @@ void cd_b(char *directory);
 int _strcmp(char *s1, char *s2);
 char *_strdup(char *src);
 void print_str(char *str, int new_line);
+int _atoi(char *s);
+int length(char *s);
+int exponent(int len);
+int total(char *s);
+int neg(char *s, int p);
 
 #endif