From 9ec4a33fc80ce507b0fe8c08b6d6825abb3334ae Mon Sep 17 00:00:00 2001
From: Theo Champion <tchampio@student.42lehavre.fr>
Date: Wed, 20 Aug 2025 15:29:33 +0200
Subject: [PATCH] dev: Added a ft_itoa_static function to avoid malloc'ing and
 free'ing every frame

---
 libft/Makefile                 |  3 +-
 libft/includes/libft.h         |  3 +-
 libft/src/str/ft_itoa_static.c | 73 ++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+), 2 deletions(-)
 create mode 100644 libft/src/str/ft_itoa_static.c

diff --git a/libft/Makefile b/libft/Makefile
index cd7a071..ab05697 100644
--- a/libft/Makefile
+++ b/libft/Makefile
@@ -2,7 +2,8 @@ CC=cc
 CFLAGS=-Wall -Wextra -Werror -g -c 
 SOURCEFILES=src/str/ft_atoi.c src/mem/ft_bzero.c src/mem/ft_calloc.c src/cond/ft_isalnum.c \
 	    src/cond/ft_isalpha.c src/cond/ft_isascii.c src/cond/ft_isdigit.c \
-	    src/cond/ft_isprint.c src/str/ft_itoa.c src/lst/ft_lstadd_back_bonus.c \
+	    src/cond/ft_isprint.c src/str/ft_itoa.c src/str/ft_itoa_static.c \
+		src/lst/ft_lstadd_back_bonus.c \
 	    src/lst/ft_lstadd_front_bonus.c src/lst/ft_lstclear_bonus.c \
 	    src/lst/ft_lstdelone_bonus.c src/lst/ft_lstiter_bonus.c \
 	    src/lst/ft_lstlast_bonus.c src/lst/ft_lstmap_bonus.c \
diff --git a/libft/includes/libft.h b/libft/includes/libft.h
index e297390..034bc95 100644
--- a/libft/includes/libft.h
+++ b/libft/includes/libft.h
@@ -6,7 +6,7 @@
 /*   By: tchampio <marvin@42.fr>                    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/10/14 12:40:57 by tchampio          #+#    #+#             */
-/*   Updated: 2024/12/18 04:40:53 by tchampio         ###   ########.fr       */
+/*   Updated: 2025/08/20 15:26:09 by tchampio         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -54,6 +54,7 @@ char	*ft_strjoin(const char *s1, const char *s2);
 char	*ft_strtrim(const char *s1, const char *set);
 char	**ft_split(const char *s, char separator);
 char	*ft_itoa(int n);
+char	*ft_itoa_static(int n, char *string, size_t buffersize);
 char	*ft_strmapi(const char *s, char (*f)(unsigned int, char));
 void	ft_striteri(char *s, void (*f)(unsigned int, char *));
 void	ft_putchar_fd(char c, int fd);
diff --git a/libft/src/str/ft_itoa_static.c b/libft/src/str/ft_itoa_static.c
new file mode 100644
index 0000000..5fde353
--- /dev/null
+++ b/libft/src/str/ft_itoa_static.c
@@ -0,0 +1,73 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_itoa_static.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tchampio <tchampio@student.42lehavre.fr>   +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/08/20 15:19:06 by tchampio          #+#    #+#             */
+/*   Updated: 2025/08/20 15:27:40 by tchampio         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../../includes/libft.h"
+#include <stdlib.h>
+
+static size_t	getnumberoffigures(int n)
+{
+	size_t	totalsize;
+	long	nn;
+
+	totalsize = 0;
+	nn = n;
+	if (n == 0)
+		return (1);
+	if (nn < 0)
+	{
+		totalsize++;
+		nn = -nn;
+	}
+	while (nn > 0)
+	{
+		nn /= 10;
+		totalsize++;
+	}
+	return (totalsize);
+}
+
+static void	populate_array(char *s, int n, size_t size)
+{
+	int		isneg;
+	long	nn;
+	size_t	index;
+
+	nn = n;
+	if (nn < 0)
+		nn = -nn;
+	isneg = (n < 0);
+	index = size - 1;
+	while (nn > 0)
+	{
+		s[index] = (nn % 10) + '0';
+		nn /= 10;
+		index--;
+	}
+	if (isneg == 1)
+		s[index] = '-';
+}
+
+char	*ft_itoa_static(int n, char *string, size_t buffersize)
+{
+	size_t	size;
+
+	size = getnumberoffigures(n);
+	ft_bzero(string, buffersize);
+	if (!string)
+		return (NULL);
+	if (size > buffersize)
+		return (NULL);
+	if (n == 0)
+		ft_strlcpy(string, "0", 2);
+	populate_array(string, n, size);
+	return (string);
+}