sync

C_07/git_old2/ex03/ft_strjoin.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strjoin.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: gbaconni <gbaconni@42lausanne.ch>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2021/08/19 11:25:51 by gbaconni          #+#    #+#             */
+/*   Updated: 2021/08/20 11:41:49 by gbaconni         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+static int	ft_strlen(char *str)
+{
+	int	len;
+
+	len = 0;
+	while (str[len] != '\0')
+		len++;
+	return (len);
+}
+
+char	*ft_strcat(char *dest, char *src)
+{
+	char			*s1;
+	char			*s2;
+
+	s1 = dest;
+	s2 = src;
+	while (*s1 != '\0')
+		s1++;
+	while (*s2 != '\0')
+		*s1++ = *s2++;
+	*s1 = '\0';
+	return (dest);
+}
+
+int	ft_strslen(int size, char **strs, char *sep)
+{
+	int		len;
+	int		i;
+
+	len = 1;
+	i = 0;
+	while (i < size)
+	{
+		len += ft_strlen(strs[i]);
+		if (i < size - 1)
+			len += ft_strlen(sep);
+		i++;
+	}
+	return (len);
+}
+
+char	*ft_strjoin(int size, char **strs, char *sep)
+{
+	char	*str;
+	int		len;
+	int		i;
+
+	if (size == 0)
+	{
+		str = (char *) malloc(sizeof(char));
+		*str = '\0';
+		return (str);
+	}
+	len = ft_strslen(size, strs, sep);
+	str = (char *) malloc(len * sizeof(char));
+	if (str == NULL)
+		return (NULL);
+	*str = '\0';
+	i = 0;
+	while (i < size)
+	{
+		ft_strcat(str, strs[i]);
+		if (i < size - 1)
+			ft_strcat(str, sep);
+		i++;
+	}
+	return (str);
+}