part 2 done (except putchar and putstr unicode)

1 files changed, 53 insertions, 0 deletions

diff --git a/ft_itoa.c b/ft_itoa.c
new file mode 100644
index 0000000..3dc4396
--- /dev/null
+++ b/ft_itoa.c
@@ -0,0 +1,53 @@
+#include <stdlib.h>
+
+
+static int  count_len(int nbr)
+{
+	int				counter;
+	unsigned int	u_nbr;
+
+	if (nbr == 0)
+		return (1);
+	counter = 0;
+	u_nbr = nbr;
+	if (nbr < 0)
+	{
+		counter++;
+		u_nbr = -nbr;
+	}
+	while (u_nbr > 0)
+	{
+		u_nbr /= 10;
+		counter++;
+	}
+	return (counter);
+}
+
+char    *ft_itoa(int n)
+{
+	char			*str;
+	int				len;
+	int				is_negative;
+	unsigned int	u_nbr;
+
+	len = count_len(n);
+	if ((str = (char*)malloc(sizeof(char) * (len + 1))) == NULL)
+		return (NULL);
+	str[len] = '\0';
+	is_negative = 0;
+	u_nbr = n;
+	if (n < 0)
+	{
+		is_negative = 1;
+		str[0] = '-';
+		u_nbr = -n;
+	}
+	len--;
+	while (len >= (is_negative ? 1 : 0))
+	{
+		str[len] = u_nbr % 10 + '0';
+		u_nbr /= 10;
+		len--;
+	}
+	return (str);
+}