syntax

lib/libft/libft.h

@@ -45,6 +45,7 @@ char	*ft_strjoin(const char *s1, const char *s2);
 char	*ft_strtrim(const char *s1, const char *set);
 char	*ft_strmapi(char const *s, char (*f)(unsigned int, char));
 void	ft_striteri(char *s, void (*f)(unsigned int, char *));
+int		is_only_space(char *str);
 
 void	*ft_memset(void *b, int c, size_t len);
 void	*ft_memcpy(void *dst, const void *src, size_t n);

lib/libft/srcs/format/ft_atoi.c

@@ -21,6 +21,17 @@ static int	ft_isspace(char c)
 		return (0);
 }
 
+int	is_only_space(char *str)
+{
+	int i;
+
+	i = -1;
+	while (str[++i])
+		if (!ft_isspace(str[i]))
+			return (0);
+	return (1);
+}
+
 static int	ft_signer(char c, int *i)
 {
 	int	sign;