feat(char): adding function for x / X / p / u / (i / d)

sources/utils.c

@@ -11,6 +11,9 @@
 /* ************************************************************************** */
 
 #include <stddef.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
 
 size_t	ft_strlen(const char *str)
 {
@@ -23,3 +26,79 @@ size_t	ft_strlen(const char *str)
 		i++;
 	return (i);
 }
+
+void	*ft_memset(void *s, int c, size_t n)
+{
+	char	*str;
+	size_t	i;
+
+	i = 0;
+	str = (char *)s;
+	while (i < n)
+	{
+		str[i] = c;
+		i++;
+	}
+	return (str);
+}
+
+void	*ft_calloc(size_t nmemb, size_t size)
+{
+	size_t	total;
+	char	*to_return;
+
+	if (nmemb == 0 || size == 0)
+		return ((void *)malloc(1));
+	total = nmemb * size;
+	if (total / nmemb != size && total / size != nmemb)
+		return (NULL);
+	to_return = (char *)malloc(total);
+	if (to_return == NULL)
+		to_return = NULL;
+	else
+		ft_memset(to_return, 0, nmemb * size);
+	return (to_return);
+}
+
+static size_t	ft_nbrlen(u_int64_t nbr, size_t base_len)
+{
+	size_t	len;
+
+	if (nbr == 0)
+		return (1);
+	len = 0;
+	while (nbr > 0)
+	{
+		nbr /= base_len;
+		len++;
+	}
+	return (len);
+}
+
+char	*itoa_base(u_int64_t nbr, char *base)
+{
+	size_t	base_len;
+	size_t	nbr_len;
+	char	*result;
+	int		i;
+
+	if (!base)
+		return (NULL);
+	base_len = ft_strlen(base);
+	if (base_len < 2)
+		return (NULL);
+	nbr_len = ft_nbrlen(nbr, base_len);
+	result = malloc(sizeof(char) * (nbr_len + 1));
+	if (!result)
+		return (NULL);
+	i = nbr_len - 1;
+	if (nbr == 0)
+		result[0] = base[0];
+	while (nbr > 0)
+	{
+		result[i] = base[nbr % base_len];
+		nbr /= base_len;
+		i--;
+	}
+	return (result);
+}