init

2026-08-31 02:16:33 +02:00
commit 94cd5aac51
25 changed files with 705 additions and 0 deletions
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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_atoi.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: rzy <ry@student.42angouleme.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/08/23 23:34:29 by rzy               #+#    #+#             */
+/*   Updated: 2026/08/23 23:37:29 by rzy              ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+#include "libft.h"
+
+static int	ft_isspace(char c)
+{
+	return (c == ' ' || (c >= '\t' && c <= '\r'));
+}
+
+int	ft_atoi(const char *nptr)
+{
+	int	result;
+	int	sign;
+	int	i;
+
+	result = 0;
+	sign = 1;
+	i = 0;
+	while (ft_isspace(nptr[i]))
+		++i;
+	if (nptr[i] == '+' || nptr[i] == '-')
+	{
+		if (nptr[i] == '-')
+			sign = -1;
+		++i;
+	}
+	while (ft_isdigit(nptr[i]))
+	{
+		result = (result * 10) + (nptr[i] - '0');
+		++i;
+	}
+	return (result * sign);
+}