adding itoa_static and ft_nbrlen

Makefile

@@ -37,6 +37,7 @@ SRCS	=	ft_memset.c \
 			ft_tolower.c \
 			\
 			ft_strlen.c \
+			ft_nbrlen.c \
 			ft_strchr.c \
 			ft_strrchr.c \
 			ft_strchrset.c \
@@ -75,6 +76,7 @@ SRCS	=	ft_memset.c \
 			ft_atoll_superscript.c \
 			ft_atof.c \
 			ft_itoa.c \
+			ft_itoa_static.c \
 			ft_utoa.c \
 			ft_atoibase.c \
 			\

includes/libft.h

@@ -27,6 +27,7 @@ void *ft_memmove(void *dst, const void *src, size_t len);
 void *ft_memchr(const void *s, int c, size_t n);
 int ft_memcmp(const void *s1, const void *s2, size_t n);
 size_t ft_strlen(const char *str);
+size_t ft_nbrlen(int nbr);
 int ft_isalpha(int c);
 int ft_isdigit(int c);
 int ft_isdigit_superscript(const char *input, int *size);
@@ -60,6 +61,7 @@ size_t ft_strjoin_static(char *dst, size_t dst_size, const char **srcs, size_t n
 char *ft_strtrim(char const *s1, char const *set);
 char **ft_split(char const *s, char c);
 char *ft_itoa(long int n);
+char *ft_itoa_static(long int nbr, char *buffer, size_t nbr_len);
 char *ft_utoa(unsigned long int n);
 char *ft_strmapi(char const *s, char (*f)(unsigned int, char));
 

srcs/ft_itoa_static.c

@@ -0,0 +1,82 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/11/25 13:59:01 by hulamy            #+#    #+#             */
+/*   Updated: 2020/02/19 15:44:04 by hulamy           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+/**
+ * Converts a long integer to its string representation and stores it in a pre-allocated buffer.
+ *
+ * @param nbr      The long integer to convert.
+ * @param buffer   The buffer to store the resulting string. Must be pre-allocated.
+ * @param buff_len  The size of the buffer.
+ *                 Must be at least as large as the length of the number (including sign).
+ *
+ * @return         The buffer (if successful), or NULL if the buffer is too small or invalid.
+ */
+
+#include "libft.h"
+
+char *ft_itoa_static(long int nbr, char *buffer, size_t buff_len)
+{
+	int is_negative;
+	const char *min_str;
+	size_t min_len;
+	size_t i;
+
+	if (buffer == NULL || buff_len == 0)
+	{
+		return NULL; // Invalid buffer or length
+	}
+
+	// Handle LONG_MIN separately
+	if (nbr == LONG_MIN)
+	{
+		min_str = "-9223372036854775808";
+		min_len = ft_strlen(min_str);
+		if (buff_len < min_len)
+		{
+			return NULL; // Buffer too small for LONG_MIN
+		}
+		i = 0;
+		while (i < min_len)
+		{
+			buffer[i] = min_str[i];
+			i++;
+		}
+		buffer[min_len] = '\0'; // Null-terminate
+		return buffer;
+	}
+
+	// Determine if the number is negative
+	is_negative = ft_sign_f(nbr);
+	if (is_negative)
+	{
+		nbr = -nbr; // Make nbr positive for processing
+	}
+
+	// Write the null terminator at the end
+	buffer[buff_len] = '\0';
+
+	// Write the digits in reverse order
+	i = buff_len - 1;
+	do
+	{
+		buffer[i--] = (nbr % 10) + '0';
+		nbr /= 10;
+	} while (nbr != 0);
+
+	// Add the negative sign if needed
+	if (is_negative)
+	{
+		buffer[0] = '-';
+	}
+
+	return buffer;
+}

srcs/ft_nbrlen.c

@@ -0,0 +1,16 @@
+
+#include "libft.h"
+
+// return length of int
+// eg. 123 -> 3, -123 -> 4
+
+size_t ft_nbrlen(int nbr)
+{
+    int len;
+
+    len = (nbr < 0) ? 2 : 1;
+    while (nbr /= 10)
+        len++;
+
+    return len;
+}